A255529 Indices of primes in the 9th-order Fibonacci number sequence, A104144.

10, 19, 878

Offset

1,1

Comments

a(4) > 2*10^5.

Links

Table of n, a(n) for n=1..3.

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

Mathematica

a={0, 0, 0, 0, 0, 0, 0, 0, 1}; step=9; lst={}; For[n=step, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], AppendTo[lst, n]]; a=RotateLeft[a]; a[[step]]=sum]; lst

Prog

(PARI) a104144(n) = polcoeff(x^8/(1-x-x^2-x^3-x^4-x^5-x^6-x^7-x^8-x^9) + O(x^(n+1)), n);
lista(nn) = {for (n=1, nn, if (isprime(a104144(n)), print1(n, ", ")); ); } \\ Michel Marcus, Feb 27 2015

Crossrefs

Cf. A001590, A001631, A100683, A231574, A231575, A232542, A214899, A230607, A020992, A232498, A214727, A081172, A214752, A141523, A214825, A235862, A000288, A000322, A000383, A249413, A060455, A079262, A104144.

Sequence in context: A045646 A334137 A212594 * A023916 A297353 A172503

Adjacent sequences: A255526 A255527 A255528 * A255530 A255531 A255532

Keyword

nonn,more

Author

Robert Price, Feb 24 2015

Status

approved