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Search: id:A105754
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| 1, 3, 7, 15, 31, 63, 127, 255, 502, 1003, 2003, 3999, 7983, 15935, 31807, 63487, 126719, 252936, 504869, 1007735, 2011471, 4014959, 8013983, 15996159, 31928831, 63730943, 127208950, 253913031, 506818327, 1011625183, 2019235407
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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Tony D. Noe and Jonathan Vos Post, Primes in Fibonacci n-step and Lucas n-step Sequences, Journal of Integer Sequences, Vol. 8 (2005), Article 05.4.4.
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..200
Eric Weisstein's World of Mathematics, Lucas n-Step Number
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FORMULA
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a(n)=sum_{k=1..8} a(n-k) for n>0, a(0)=8, a(n)=-1 for n=-7..-1
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MATHEMATICA
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a={-1, -1, -1, -1, -1, -1, -1, 8}; Table[s=Plus@@a; a=RotateLeft[a]; a[[ -1]]=s, {n, 50}]
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CROSSREFS
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Cf. A000032, A001644, A073817, A074048, A074584, A104621, A105755 (Lucas n-step numbers).
Sequence in context: A043740 A116082 A043747 this_sequence A116690 A043755 A105755
Adjacent sequences: A105751 A105752 A105753 this_sequence A105755 A105756 A105757
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KEYWORD
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nonn
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AUTHOR
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T. D. Noe (noe(AT)sspectra.com), Apr 22 2005
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