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Search: id:A144366
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| A144366 |
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Shifts 2 places left under Dirichlet convolution. |
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+0
2
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| 1, 1, 1, 2, 2, 5, 4, 12, 8, 28, 17, 60, 34, 134, 68, 276, 140, 580, 280, 1186, 560, 2436, 1128, 4906, 2256, 9976, 4516, 20020, 9048, 40324, 18096, 80860, 36192, 162320, 72418, 324920, 144852, 651177, 289704, 1302914, 579476, 2608360, 1158952
(list; graph; listen)
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OFFSET
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1,4
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LINKS
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N. J. A. Sloane, Transforms
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MAPLE
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k:= 2: with (numtheory): dck:= proc(b, c) proc(n, k) option remember; add (b(d, k) *c(n/d, k), d=`if`(n<0, {}, divisors(n))) end end: B:= dck(T, T): T:= (n, k)-> if n<=k then 1 else B(n-k, k) fi: a:= n-> T(n, k): seq (a(n), n=1..50);
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CROSSREFS
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2nd column of A144374. Cf. A000005.
Sequence in context: A112472 A124506 A112471 this_sequence A054156 A054079 A005177
Adjacent sequences: A144363 A144364 A144365 this_sequence A144367 A144368 A144369
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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 18 2008
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