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A253318 Indices of primes in the 7th-order Fibonacci number sequence, A060455. 4
7, 8, 11, 12, 14, 15, 16, 17, 18, 19, 21, 23, 26, 32, 33, 36, 42, 44, 71, 72, 137, 180, 193, 285, 679, 955, 1018, 1155, 1176, 1191, 2149, 2590, 2757, 3364, 4233, 6243, 6364, 7443, 10194, 11254, 13318, 18995, 20478, 22647, 29711, 34769, 61815, 71993, 107494, 135942, 148831 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
a(52) > 2*10^5.
LINKS
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={1, 1, 1, 1, 1, 1, 1}; step=7; lst={}; For[n=step, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], AppendTo[lst, n]]; a=RotateLeft[a]; a[[7]]=sum]; lst
CROSSREFS
Sequence in context: A071117 A054221 A195240 * A277026 A309592 A090385
KEYWORD
nonn
AUTHOR
Robert Price, Dec 30 2014
STATUS
approved

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Last modified July 18 13:04 EDT 2024. Contains 374378 sequences. (Running on oeis4.)