The On-Line Encyclopedia of Integer Sequences

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The Email Servers and Superseeker

There are two automatic email servers for identifying sequences:

• The first,[email protected],does a simple look-up in the OEIS.Send the message
  

        lookup 1 2 5 14 42 132 429         [no commas!]
  

  for example (with no Subject line).Up to 30 sequences can be submitted at the same time.

  The email reply will tell you any sequencesin the OEIS (up to a limit of 50) that match your sequence.

  If the word "lookup" does not appear in your message,you will be sent thehelp filefor this server.

  You can also retrieve sequences by A-number -- say
        lookup A12
        lookup A45
        lookup A129
  etc

  (However, you can't have both sequence lookups and A-number lookupsin the same email message.)

• The second server,Superseeker, doesnot just look up the sequence in the OEIS, it will alsoapply a large number of algorithms in order to attempt to explain thesequence. Send a message to

  [email protected]

  containing a line like

  lookup 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31

  (with no Subject line).The program will try VERY hard to find an explanation.Only one request may be submitted at a time, and (since thisprogram does some serious computing), only one request per userper hour please. If there is no lookup line you will receive thehelp filefor Superseeker.

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Source Code For Email Servers and Superseeker

Clickhere.

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