A214898 Conway's subprime Fibonacci sequence, largest loop elements.

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

Offset: 1

Author

Wouter Meeussen, Jul 29 2012

Keywords

• nonn

Comments

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).

Links

• Richard K. Guy, Tanya Khovanova and Julian Salazar, Conway's subprime Fibonacci sequences, arXiv:1207.5099v1 [math.NT]

Crossrefs

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

Programs

Mathematica

see A214674