A214894 Conway's subprime Fibonacci sequence starting with (10, 18).

10, 18, 14, 16, 15, 31, 23, 27, 25, 26, 17, 43, 30, 73, 103, 88, 191, 93, 142, 47, 63, 55, 59, 57, 58, 23, 27

Offset

1,1

Comments

Similar to the Fibonacci recursion starting with (10, 18), but each new nonprime term is divided by its least prime factor. Sequence enters a loop of length 19 after 8 terms on reaching (23, 27).

Links

Table of n, a(n) for n=1..27.

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

Mathematica

see A214674

Crossrefs

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

Sequence in context: A320930 A337325 A156382 * A368477 A084487 A055567

Adjacent sequences: A214891 A214892 A214893 * A214895 A214896 A214897

Keyword

nonn

Author

Wouter Meeussen, Jul 29 2012

Status

approved