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A105756 Indices of prime Fibonacci 5-step numbers, A001591. 4
3, 7, 8, 25, 146, 169, 182, 751, 812, 1507, 1591, 3157, 3752, 10651, 12740, 71804, 155953 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

No other n < 44000.

The Noe and Post reference below utilizes a scheme for its indices which differs by 3 from the indices in A001591. - Robert Price, Oct 13 2014

The sequence is similar to A248757 which uses the indexing scheme starting at 0 as defined by A001591. - Robert Price, Oct 13 2014

a(18) > 2*10^5. - Robert Price, Oct 13 2014

LINKS

Table of n, a(n) for n=1..17.

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

Eric Weisstein's World of Mathematics, Fibonacci n-Step Number

MATHEMATICA

a = {1, 0, 0, 0, 0}; lst = {}; Do[s = Plus @@ a; a = RotateLeft[a];

  a[[-1]] = s; If[PrimeQ[s], AppendTo[lst, n]], {n, 44000}]; lst

CROSSREFS

Cf. A105757 (prime Fibonacci 5-step numbers).

Sequence in context: A102007 A152486 A301523 * A152057 A177689 A191611

Adjacent sequences:  A105753 A105754 A105755 * A105757 A105758 A105759

KEYWORD

nonn

AUTHOR

T. D. Noe, Apr 22 2005

EXTENSIONS

Restored original sequence after reconsideration and added a(16)-a(17) by Robert Price, Oct 13 2014

STATUS

approved

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Last modified December 6 07:09 EST 2019. Contains 329785 sequences. (Running on oeis4.)