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Conway's subprime Fibonacci sequence, largest loop elements.
10

%I #8 Jul 16 2015 22:19:23

%S 2,827,607,239,191,5693,347

%N Conway's subprime Fibonacci sequence, largest loop elements.

%C Similar to the Fibonacci recursion starting with a pair of positive integers, but each new nonprime term is divided by its least prime factor. Recursion enters a loop of length A214897(n), of which the largest element a(n) is prime (this sequence).

%H Richard K. Guy, Tanya Khovanova and Julian Salazar, <a href="http://arxiv.org/abs/1207.5099">Conway's subprime Fibonacci sequences</a>, arXiv:1207.5099v1 [math.NT]

%t see A214674

%Y Cf. A000045, A020639, A175723, A214551, A014682, A214674, A214892-A214898.

%K nonn

%O 1,1

%A _Wouter Meeussen_, Jul 29 2012