A256498 - OEIS

A256498

Indices of primes in the 9th-order Fibonacci number sequence, A127193.

11, 15, 25, 31, 36, 37, 42, 45, 48, 75, 149, 156, 160, 182, 268, 444, 581, 1025, 1125, 2504, 6900, 10924, 11807, 25262, 26774, 28739, 29367, 34902, 43345, 53878, 74473, 107070, 170300, 178994

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OFFSET

1,1

COMMENTS

a(35) > 2*10^5.

LINKS

Table of n, a(n) for n=1..34.

Tony D. Noe and Jonathan Vos Post, Primes in Fibonacci n-step and Lucas n-step Sequences, J. of Integer Sequences, Vol. 8 (2005), Article 05.4.4.

OEIS Wiki, Index of Fibonacci Numbers and Variants

OEIS Wiki, Index to OEIS Section Fi

MATHEMATICA

a={1, 1, 1, 1, 1, 1, 1, 1, 1}; step=9; lst={}; For[n=step+1, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], AppendTo[lst, n]]; a=RotateLeft[a]; a[[step]]=sum]; lst

CROSSREFS

Cf. A127193, A256499.

Sequence in context: A158019 A228205 A343416 * A054280 A214863 A094766

Adjacent sequences: A256495 A256496 A256497 * A256499 A256500 A256501

KEYWORD

nonn,more

AUTHOR

Robert Price, Mar 31 2015

STATUS

approved