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A248920
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Indices of primes in the pentanacci numbers sequence A000322.
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5
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5, 7, 13, 18, 19, 34, 35, 38, 43, 48, 188, 286, 450, 501, 759, 1446, 2021, 2419, 2997, 3715, 5677, 13566, 46303, 57174, 108844, 117145, 166683, 178863
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OFFSET
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1,1
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COMMENTS
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a(29) > 2*10^5.
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LINKS
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MATHEMATICA
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a={1, 1, 1, 1, 1}; For[n=5, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], Print[n]]; a=RotateLeft[a]; a[[5]]=sum]
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CROSSREFS
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Cf. A001590, A001631, A100683, A231574, A231575, A232542, A214899, A230607, A020992, A232498, A214727, A081172, A214752, A141523, A214825, A235862, A000288, A000322.
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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