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Rabbit Sequence


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Rabbit sequence recurrence plot

Asequence which arises in the hypothetical reproduction of a population of rabbits. Let thesubstitution system map0->1 correspond to young rabbits growing old, and1->10 correspond to old rabbits producing young rabbits. Starting with 0 and iterating usingstring rewriting gives the terms 1, 10, 101, 10110, 10110101, 1011010110110, .... Arecurrence plot of the limiting value of this sequence is illustrated above.

Converted todecimal, this sequence gives 1, 2, 5, 22, 181, ... (OEISA005203), with thenth term given by therecurrence relation

 a(n)=a(n-1)2^(F_(n-1))+a(n-2),

witha(0)=0,a(1)=1, andF_n thenthFibonacci number.

The limiting sequence written as abinaryfraction0.1011010110110..._2 (OEISA005614), where(a_n...a_1a_0)_2 denotes abinary number (i.e., a number written in base 2, soa_i=0 or 1), is called therabbit constant.


See also

Fibonacci Number,RabbitConstant,Thue-Morse Sequence

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References

Davison, J. L. "A Series and Its Associated Continued Fraction."Proc. Amer. Math. Soc.63, 29-32, 1977.Gould, H. W.; Kim, J. B.; and Hoggatt, V. E. Jr. "Sequences Associated witht-ary Coding of Fibonacci's Rabbits."Fib. Quart.15, 311-318, 1977.Schroeder, M.Fractals, Chaos, Power Laws: Minutes from an Infinite Paradise. New York: W. H. Freeman, p. 55, 1991.Sloane, N. J. A. SequencesA005203/M1539 andA005614 in "The On-Line Encyclopedia of Integer Sequences."

Referenced on Wolfram|Alpha

Rabbit Sequence

Cite this as:

Weisstein, Eric W. "Rabbit Sequence."FromMathWorld--A Wolfram Web Resource.https://mathworld.wolfram.com/RabbitSequence.html

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Created, developed and nurtured by Eric Weisstein at Wolfram Research

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