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URL: https://oeis.org/A248700

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A248700
Indices of primes in the Heptanacci numbers sequence A122189.
1
8, 14, 22, 102495, 130447, 173590
OFFSET
1,1
COMMENTS
a(7) > 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={0, 0, 0, 0, 0, 0, 1}; For[n=7, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], Print[n]]; a=RotateLeft[a]; a[[7]]=sum]
KEYWORD
nonn,more
AUTHOR
Robert Price, Dec 02 2014
STATUS
approved