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Search: id:A144371
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| A144371 |
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Shifts 7 places left under Dirichlet convolution. |
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+0
2
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| 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 2, 4, 2, 4, 5, 6, 6, 8, 8, 6, 10, 13, 12, 18, 16, 22, 14, 26, 26, 32, 37, 40, 48, 34, 52, 66, 64, 86, 86, 108, 70, 125, 132, 144, 180, 194, 216, 158, 250, 290, 300, 386, 388, 472, 317, 540, 592, 640, 772, 836, 950, 668, 1096, 1236, 1280
(list; graph; listen)
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OFFSET
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1,9
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LINKS
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N. J. A. Sloane, Transforms
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MAPLE
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k:= 7: 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..80);
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CROSSREFS
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7th column of A144374. Cf. A000005.
Sequence in context: A144372 A049238 A001616 this_sequence A101296 A077462 A129294
Adjacent sequences: A144368 A144369 A144370 this_sequence A144372 A144373 A144374
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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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