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A214898 Conway's subprime Fibonacci sequence, largest loop elements. 9
2, 827, 607, 239, 191, 5693, 347 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

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

Table of n, a(n) for n=1..7.

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

MATHEMATICA

see A214674

CROSSREFS

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

Sequence in context: A243409 A281195 A109555 * A230396 A028485 A034227

Adjacent sequences:  A214895 A214896 A214897 * A214899 A214900 A214901

KEYWORD

nonn

AUTHOR

Wouter Meeussen, Jul 29 2012

STATUS

approved

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Last modified August 19 01:41 EDT 2017. Contains 290789 sequences.