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900 (nine hundred) is thenatural number following899 and preceding901. It is thesquare of30 and the sum ofEuler's totient function for the first 54positive integers. In base 10, it is aHarshad number. It is also the first number to be the square of asphenic number.

In other fields

[edit]

900 is also:

A telephonearea code for"premium" telephone calls in theNorth American Numbering Plan (900 number)^[1]
In Greeknumber symbols, the signSampi ("ϡ", literally "like api")
Askateboarding trick in which the skateboarder spins two and a half times (360 degrees times 2.5 is 900)
A900 series refers to three consecutiveperfect games inbowling^[2]
Yoda's age inStar Wars^[3]

Integers from 901 to 999

[edit]

900s

[edit]

901 = 17 × 53,centered triangular number,happy number
902 = 2 × 11 × 41,sphenic number,nontotient, Harshad number
903 = 3 × 7 × 43, sphenic number, 42ndtriangular number,^[4]Schröder–Hipparchus number,Mertens function(903) returns 0,little Schroeder number
904 = 2³ × 113 or 113 × 8,refactorable number, Mertens function(904) returns 0,lazy caterer number, number of 1's in all partitions of 26 into odd parts^[5]
905 = 5 × 181, sum of seven consecutive primes (109 + 113 + 127 + 131 + 137 + 139 + 149), smallest composite de Polignac number^[6]
- "The 905" isa common nickname for the suburban portions of theGreater Toronto Area in Canada, a region whose telephones usedarea code 905 beforeoverlay plans added two more area codes.
906 = 2 × 3 × 151,strobogrammatic, sphenic number, Mertens function(906) returns 0
907 = prime number
908 = 2² × 227, nontotient, number of primitive sorting networks on 6 elements,^[7] number of rhombic tilings of a 12-gon^[7]
909 = 3² × 101, number of non-isomorphic aperiodic multiset partitions of weight 7^[8]

910s

[edit]

910 = 2 × 5 × 7 × 13, Mertens function(910) returns 0, Harshad number,happy number, balanced number,^[9] number of polynomial symmetric functions of matrix of order 7 under separate row and column permutations^[10]
911 =Sophie Germain prime number, also theemergency telephone number in North America
912 = 2⁴ × 3 × 19, sum of four consecutive primes (223 + 227 + 229 + 233), sum of ten consecutive primes (71 + 73 + 79 + 83 + 89 + 97 + 101 + 103 + 107 + 109), Harshad number.
913 = 11 × 83,Smith number,^[11] Mertens function(913) returns 0.
914 = 2 × 457, nontotient, number of compositions of 11 that are neither weakly increasing nor weakly decreasing^[12]
915 = 3 × 5 × 61, sphenic number, Smith number,^[11] Mertens function(915) returns 0, Harshad number
916 = 2² × 229, Mertens function(916) returns 0, nontotient,strobogrammatic, member of theMian–Chowla sequence^[13]
917 = 7 × 131, sum of five consecutive primes (173 + 179 + 181 + 191 + 193)
918 = 2 × 3³ × 17, Harshad number
919 = prime number,cuban prime,^[14]prime index prime,Chen prime,palindromic prime,centered hexagonal number,^[15] Mertens function(919) returns 0

920s

[edit]

920 = 2³ × 5 × 23, Mertens function(920) returns 0, total number of nodes in all rooted trees with 8 nodes^[16]
921 = 3 × 307, number of enriched r-trees of size 7^[17]
922 = 2 × 461, nontotient, Smith number^[11]
923 = 13 × 71, number of combinations of 6 things from 1 to 6 at a time^[18]
924 = 2² × 3 × 7 × 11, sum of a twin prime (461 + 463),central binomial coefficient ${\tbinom {12}{6}}$ ^[19]
925 = 5² × 37,pentagonal number,^[20]centered square number^[21]
- Themillesimal fineness number forSterling silver
926 = 2 × 463, sum of six consecutive primes (139 + 149 + 151 + 157 + 163 + 167), nontotient
927 = 3² × 103,tribonacci number^[22]
928 = 2⁵ × 29, sum of four consecutive primes (227 + 229 + 233 + 239), sum of eight consecutive primes (101 + 103 + 107 + 109 + 113 + 127 + 131 + 137),happy number
929 = prime number,Proth prime,^[23] palindromic prime, sum of nine consecutive primes (83 + 89 + 97 + 101 + 103 + 107 + 109 + 113 + 127),Eisenstein prime with no imaginary part
- Anarea code in New York.

930s

[edit]

930 = 2 × 3 × 5 × 31,pronic number^[24]
931 = 7² × 19; sum of three consecutive primes (307 + 311 + 313); doublerepdigit, 111₃₀ and 777₁₁; number of regular simple graphs spanning 7 vertices^[25]
932 = 2² × 233, number of regular simple graphs on 7 labeled nodes^[26]
933 = 3 × 311
934 = 2 × 467, nontotient
935 = 5 × 11 × 17, sphenic number,Lucas–Carmichael number,^[27] Harshad number
936 = 2³ × 3² × 13,pentagonal pyramidal number,^[28] Harshad number
937 = prime number, Chen prime,star number,^[29]happy number
938 = 2 × 7 × 67, sphenic number, nontotient, number of lines through at least 2 points of an 8 × 8 grid of points^[30]
939 = 3 × 313, number of V-toothpicks after 31 rounds of the honeycomb sequence^[31]

940s

[edit]

940 = 2² × 5 × 47, totient sum for first 55 integers
941 = prime number, sum of three consecutive primes (311 + 313 + 317), sum of five consecutive primes (179 + 181 + 191 + 193 + 197), Chen prime, Eisenstein prime with no imaginary part
942 = 2 × 3 × 157, sphenic number, sum of four consecutive primes (229 + 233 + 239 + 241), nontotient, convolved Fibonacci number^[32]
943 = 23 × 41
944 = 2⁴ × 59, nontotient, Lehmer-Comtet number^[33]
945 = 3³ × 5 × 7,double factorial of9,^[34] smallest oddabundant number (proper divisors add up to more than 975);^[35] smallest oddprimitive abundant number;^[36] smallest oddprimitive semiperfect number;^[37]Leyland number^[38]
946 = 2 × 11 × 43, sphenic number, 43rdtriangular number,^[4]hexagonal number,^[39]happy number
947 = prime number, sum of seven consecutive primes (113 + 127 + 131 + 137 + 139 + 149 + 151),balanced prime,^[40]Chen prime,lazy caterer number,Eisenstein prime with no imaginary part
948 = 2² × 3 × 79, nontotient, forms aRuth–Aaron pair with 949 under second definition, number of combinatory separations of normal multisets of weight 6.^[41]
949 = 13 × 73, forms a Ruth–Aaron pair with 948 under second definition

950s

[edit]

950 = 2 × 5² × 19, nontotient,generalized pentagonal number^[42]
- one of twoISBN Group Identifiers for books published inArgentina
951 = 3 × 317,centered pentagonal number^[43]
- one of two ISBN Group Identifiers for books published in Finland
952 = 2³ × 7 × 17, number of reduced words of length 3 in the Weyl group D_17,^[44] number of regions in regular tetradecagon with all diagonals drawn.^[45]
- 952 is also9-5-2, acard game similar tobridge.
- one of two ISBN Group Identifiers for books published in Finland
953 = prime number, Sophie Germain prime,^[46] Chen prime, Eisenstein prime with no imaginary part,centered heptagonal number^[47]
- ISBN Group Identifier for books published inCroatia
954 = 2 × 3² × 53, sum of ten consecutive primes (73 + 79 + 83 + 89 + 97 + 101 + 103 + 107 + 109 + 113), nontotient, Harshad number, sixth derivative of x^(x^x) at x=1.^[48]
- ISBN Group Identifier for books published in Bulgaria. Also one of theArea Codes in theSouth Florida Area
955 = 5 × 191, number of transitive rooted trees with 17 nodes
- ISBN Group Identifier for books published in Sri Lanka
956 = 2² × 239, number of compositions of 13 into powers of 2.^[49]
- ISBN Group Identifier for books published in Chile
957 = 3 × 11 × 29, sphenic number, antisigma(45)^[50]
- one of two ISBN Group Identifiers for books published in Taiwan and China
958 = 2 × 479, nontotient,Smith number^[11]
- ISBN Group Identifier for books published inColombia
- Themillesimal fineness number forBritannia silver
959 = 7 × 137, composite de Polignac number^[51]
- ISBN Group Identifier for books published in Cuba

960s

[edit]

960 = 2⁶ × 3 × 5, sum of six consecutive primes (149 + 151 + 157 + 163 + 167 + 173), Harshad number
- country calling code for Maldives, ISBN Group Identifier for books published in Greece
- The number of possible starting positions for the chess variantChess960
961 = 31², the largest 3-digit perfect square, sum of three consecutive primes (313 + 317 + 331), sum of five consecutive primes (181 + 191 + 193 + 197 + 199),centered octagonal number^[52]
- country calling code for Lebanon, ISBN Group Identifier for books published inSlovenia
962 = 2 × 13 × 37, sphenic number, nontotient
- country calling code for Jordan, one of two ISBN Group Identifiers for books published in Hong Kong
963 = 3² × 107, sum of the first twenty-four primes
- country calling code for Syria, ISBN Group Identifier for books published in Hungary
964 = 2² × 241, sum of four consecutive primes (233 + 239 + 241 + 251), nontotient, totient sum for first 56 integers
- country calling code for Iraq, ISBN Group Identifier for books published in Iran,happy number
965 = 5 × 193
- country calling code for Kuwait, ISBN Group Identifier for books published in Israel
966 = 2 × 3 × 7 × 23 = $\left\{{8 \atop 3}\right\}$ , sum of eight consecutive primes (103 + 107 + 109 + 113 + 127 + 131 + 137 + 139), Harshad number
- country calling code for Saudi Arabia, one of two ISBN Group Identifiers for books published in Ukraine
967 = prime number,prime index prime
- country calling code for Yemen, one of two ISBN Group Identifiers for books published in Malaysia
968 = 2³ × 11², nontotient,Achilles number, area of a square with diagonal 44^[53]
- country calling code for Oman, one of two ISBN Group Identifiers for books published in Mexico
969 = 3 × 17 × 19, sphenic number,nonagonal number,^[54]tetrahedral number^[55]
- ISBN Group Identifier for books published in Pakistan, age ofMethuselah according to Old Testament,anti-Muslim movement in Myanmar

970s

[edit]

970 = 2 × 5 × 97, sphenic number,heptagonal number
- country calling code for Palestinian territories, one of two ISBN Group Identifiers for books published in Mexico
971 = prime number, Chen prime, Eisenstein prime with no imaginary part
- country calling code for United Arab Emirates, ISBN Group Identifier for books published in the Philippines
972 = 2² × 3⁵, Harshad number,Achilles number
- country calling code for Israel, one of two ISBN Group Identifiers for books published in Portugal
  - The Sum of Anti-Factors of 972 = number * (n/2) where n is an Odd number. So, it is a Hemi-Anti-Perfect Number. Other such Numbers include 2692, etc.

972 has Anti-Factors = 5, 8, 24, 29, 67, 72, 216, 389, 648

Sum of Anti-Factors = 5 + 8 + 24 + 29 + 67 + 72 + 216 + 389 + 648 = 1458 = 972 * 3/2

973 = 7 × 139,happy number
- country calling code for Bahrain, ISBN Group Identifier for books published in Romania,
974 = 2 × 487, nontotient, 974! - 1 is prime^[56]
- country calling code for Qatar, ISBN Group Identifier for books published in Thailand
975 = 3 × 5² × 13
- country calling code for Bhutan, ISBN Group Identifier for books published in Turkey
976 = 2⁴ × 61,decagonal number^[57]
- country calling code for Mongolia, ISBN Group Identifier for books published inAntigua,Bahamas,Barbados,Belize,Cayman Islands,Dominica,Grenada,Guyana,Jamaica,Montserrat,Saint Kitts and Nevis,St. Lucia,St. Vincent and the Grenadines,Trinidad and Tobago, and theBritish Virgin Islands
977 = prime number, sum of nine consecutive primes (89 + 97 + 101 + 103 + 107 + 109 + 113 + 127 + 131), balanced prime,^[40] Chen prime, Eisenstein prime with no imaginary part,Stern prime,^[58] strictly non-palindromic number^[59]
- country calling code for Nepal
- EAN prefix forISSNs
- ISBN Group Identifier for books published inEgypt
978 = 2 × 3 × 163, sphenic number, nontotient, number of secondary structures of RNA molecules with 11 nucleotides^[60]
- FirstEAN prefix for ISBNs
- ISBN Group Identifier for books published inNigeria
979 = 11 × 89, the sum of the five smallest fourth powers: $979=\sum _{n=1}^{5}n^{4}$
- SecondEAN prefix for ISBNs. Also for ISMNs
- ISBN Group Identifier for books published inIndonesia

980s

[edit]

980 = 2² × 5 × 7², number of ways to tile a hexagon of edge 3 withcalissons of side 1.^[61]
- ISBN Group Identifier for books published inVenezuela
981 = 3² × 109
- one of two ISBN Group Identifiers for books published inSingapore
982 = 2 × 491,happy number
- ISBN Group Identifier for books published in theCook Islands,Fiji,Kiribati,Marshall Islands,Micronesia,Nauru,New Caledonia,Niue,Palau,Solomon Islands,Tokelau,Tonga,Tuvalu,Vanuatu,Western Samoa
983 = prime number,safe prime,^[62] Chen prime, Eisenstein prime with no imaginary part,Wedderburn–Etherington number,^[63] strictly non-palindromic number^[59]
- One of two ISBN Group Identifiers for books published inMalaysia
984 = 2³ × 3 × 41
- ISBN Group Identifier for books published inBangladesh
985 = 5 × 197, sum of three consecutive primes (317 + 331 + 337),Markov number,^[64]Pell number,^[65] Smith number^[11]
- one of two ISBN Group Identifiers for books published inBelarus
986 = 2 × 17 × 29, sphenic number, nontotient,strobogrammatic, number of unimodal compositions of 14 where the maximal part appears once^[66]
- one of two ISBN Group Identifiers for books published in Taiwan and China
987 = 3 × 7 × 47,sphenic number,Fibonacci number,^[67]number of partitions of 52 into prime parts
- one of two ISBN Group Identifiers for books published in Argentina
988 = 2² × 13 × 19, nontotient. sum of four consecutive primes (239 + 241 + 251 + 257). Acake number.
- one of two ISBN Group Identifiers for books published in Hong Kong.
- thesuicide prevention hotline in the United States
989 = 23 × 43, Extra strongLucas pseudoprime^[68]
- one of two ISBN Group Identifiers for books published in Portugal

990s

[edit]

990 = 2 × 3² × 5 × 11, sum of six consecutive primes (151 + 157 + 163 + 167 + 173 + 179), 44thtriangular number,^[4] Harshad number
- best possibleVantageScore credit score
991 = prime number, sum of five consecutive primes (191 + 193 + 197 + 199 + 211), sum of seven consecutive primes (127 + 131 + 137 + 139 + 149 + 151 + 157), Chen prime, lucky prime,prime index prime
992 = 2⁵ × 31,pronic number,^[24] nontotient; number of eleven-dimensionalexotic spheres.^[69]
- country calling code for Tajikistan
993 = 3 × 331
- country calling code for Turkmenistan
994 = 2 × 7 × 71, sphenic number, nontotient, number of binary words of length 13 with all distinct runs.^[70]
- country calling code for Azerbaijan
995 = 5 × 199
- country calling code for Georgia
- Singapore fire brigade and emergency ambulance services hotline,Brunei Darussalam fire service emergency number
996 = 2² × 3 × 83
- country calling code for Kyrgyzstan
997 = largest three-digit prime number, strictly non-palindromic number.^[59] It is also alucky prime.
998 = 2 × 499, nontotient, number of 7-node graphs with two connected components.^[71]
- country calling code for Uzbekistan

Main article:999 (number)

999 = 3³ × 37,Kaprekar number,^[72] Harshad number
- In some parts of the world, such as the UK andCommonwealth countries,999 (pronounced asnine, nine, nine) is theemergency telephone number for all emergency services
- 999 was a Londonpunk band active during the 1970s.
- A number commonly associated withJuice WRLD

References

[edit]

Wikimedia Commons has media related to900 (number).

^"Pay-Per-Call Information Services".Federal Communications Commission. 2011-02-11. Retrieved2021-03-31.
^"Bowler throws 36 consecutive strikes for incredible 900 series".For The Win. 2016-01-13. Retrieved2021-03-31.
^Sawan, Amer (2024-06-14)."How Old is Yoda in The Phantom Menace?".CBR. Retrieved2025-04-19.
^^a ^b ^c"Sloane's A000217: Triangular numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^Sloane, N. J. A. (ed.)."Sequence A036469 (Partial sums of A000009 (partitions into distinct parts))".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
^"Sloane's A098237: Composite de Polignac numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-10.
^^a ^bSloane, N. J. A. (ed.)."Sequence A006245 (Number of primitive sorting networks on n elements; also number of rhombic tilings of a 2n-gon)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-24.
^Sloane, N. J. A. (ed.)."Sequence A303546 (Number of non-isomorphic aperiodic multiset partitions of weight n)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-24.
^Sloane, N. J. A. (ed.)."Sequence A020492 (Balanced numbers: numbers k such that phi(k) (A000010) divides sigma(k) (A000203))".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
^Sloane, N. J. A. (ed.)."Sequence A007716 (Number of polynomial symmetric functions of matrix of order n under separate row and column permutations)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
^^a ^b ^c ^d ^e"Sloane's A006753 : Smith numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^Sloane, N. J. A. (ed.)."Sequence A332834 (Number of compositions of n that are neither weakly increasing nor weakly decreasing)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-23.
^"Sloane's A005282 : Mian-Chowla sequence".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A002407 : Cuban primes".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A003215 : Hex (or centered hexagonal) numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^Sloane, N. J. A. (ed.)."Sequence A055544 (Total number of nodes in all rooted trees with n nodes)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-23.
^Sloane, N. J. A. (ed.)."Sequence A301462 (Number of enriched r-trees of size n)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-23.
^Sloane, N. J. A. (ed.)."Sequence A030662 (Number of combinations of n things from 1 to n at a time, with repeats allowed)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-23.
^"Sloane's A000984 : Central binomial coefficients".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A000326 : Pentagonal numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A001844 : Centered square numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A000073 : Tribonacci numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A080076 : Proth primes".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^^a ^b"Sloane's A002378 : Oblong (or promic, pronic, or heteromecic) numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^Sloane, N. J. A. (ed.)."Sequence A319612 (Number of regular simple graphs spanning n vertices)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-23.
^Sloane, N. J. A. (ed.)."Sequence A295193 (Number of regular simple graphs on n labeled nodes)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-22.
^"Sloane's A006972 : Lucas-Carmichael numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A002411 : Pentagonal pyramidal numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A003154 : Centered 12-gonal numbers. Also star numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^Sloane, N. J. A. (ed.)."Sequence A018808 (Number of lines through at least 2 points of an n X n grid of points)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-22.
^Sloane, N. J. A. (ed.)."Sequence A161206 (V-toothpick (or honeycomb) sequence)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
^Sloane, N. J. A. (ed.)."Sequence A001628 (Convolved Fibonacci numbers)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
^Sloane, N. J. A. (ed.)."Sequence A005727".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
^"Sloane's A006882 : Double factorials".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^Higgins, Peter (2008).Number Story: From Counting to Cryptography. New York: Copernicus. p. 13.ISBN 978-1-84800-000-1.
^"Sloane's A006038 : Odd primitive abundant numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A006036 : Primitive pseudoperfect numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A076980 : Leyland numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A000384 : Hexagonal numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^^a ^b"Sloane's A006562 : Balanced primes".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^Sloane, N. J. A. (ed.)."Sequence A269134 (Number of combinatory separations of normal multisets of weight n)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-13.
^Sloane, N. J. A. (ed.)."Sequence A001318 (Generalized pentagonal numbers)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A005891 : Centered pentagonal numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^Sloane, N. J. A. (ed.)."Sequence A162328 (Number of reduced words of length n in the Weyl group D_17)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-12.
^Sloane, N. J. A. (ed.)."Sequence A007678 (Number of regions in regular n-gon with all diagonals drawn.)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-13.
^"Sloane's A005384 : Sophie Germain primes".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A069099 : Centered heptagonal numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^Sloane, N. J. A. (ed.)."Sequence A179230".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-12.
^(sequenceA023359 in theOEIS)
^Sloane, N. J. A. (ed.)."Sequence A024816 (Antisigma(n): Sum of the numbers less than n that do not divide n)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-05-11.
^"Sloane's A098237: Composite de Polignac numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-10.
^"Sloane's A016754 : Odd squares: a(n) = (2n+1)^2. Also centered octagonal numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^Sloane, N. J. A. (ed.)."Sequence A001105".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
^"Sloane's A001106 : 9-gonal (or enneagonal or nonagonal) numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A000292 : Tetrahedral numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"A002982: Numbers n such that n! - 1 is prime".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-10.
^"Sloane's A001107 : 10-gonal (or decagonal) numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A042978 : Stern primes".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^^a ^b ^c"Sloane's A016038 : Strictly non-palindromic numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^Sloane, N. J. A. (ed.)."Sequence A004148 (Generalized Catalan numbers)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
^"A008793".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-10.
^"Sloane's A005385 : Safe primes".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A001190 : Wedderburn-Etherington numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A002559 : Markoff (or Markov) numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A000129 : Pell numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^Sloane, N. J. A. (ed.)."Sequence A006330 (Number of corners, or planar partitions of n with only one row and one column)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
^"Sloane's A000045 : Fibonacci numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"Sloane's A0217719 : Extra strong Lucas pseudoprimes".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-11.
^"week164". Math.ucr.edu. 2001-01-13. Retrieved2014-05-12.
^"A351016".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-10.
^"A275165".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-05-10.
^"Sloane's A006886 : Kaprekar numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-06-02.

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