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Search: id:A144819
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| A144819 |
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Shifts left when Dirichlet convolution with a (DC:(b,a)->c) applied 5 times. |
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+0
2
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| 1, 1, 6, 36, 231, 1386, 8496, 50976, 306956, 1842276, 11060586, 66363516, 398229516, 2389377096, 14336517456, 86019146316, 516116428791, 3096698572746, 18580200896796, 111481205380776, 668887287816276
(list; graph; listen)
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OFFSET
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1,3
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LINKS
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N. J. A. Sloane, Transforms
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MAPLE
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with (numtheory): dc:= proc(b, c) proc(n) option remember; add (b(d) *c(n/d), d=`if`(n<0, {}, divisors(n))) end end: A:= proc(n, k) local a, b, t; b[1]:= dc(a, a); for t from 2 to k do b[t]:= dc(b[t-1], a) od: a:= n-> `if`(n=1, 1, b[k](n-1)); a(n) end: a:= n-> A(n, 5): seq (a(n), n=1..30);
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CROSSREFS
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5th column of A144324.
Sequence in context: A166748 A085687 A129327 this_sequence A099252 A057395 A066053
Adjacent sequences: A144816 A144817 A144818 this_sequence A144820 A144821 A144822
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KEYWORD
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eigen,nonn
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AUTHOR
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Alois P. Heinz (heinz(AT)hs-heilbronn.de), Sep 21 2008
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