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A268500 Expansion of Product_{k>=1} ((1 + k*x^k) / (1 + x^k)). 6
1, 0, 1, 2, 2, 6, 7, 14, 11, 42, 39, 70, 95, 142, 239, 378, 418, 624, 1106, 1200, 2250, 2836, 4166, 4902, 8021, 10410, 14961, 21268, 29477, 36714, 54172, 68358, 95071, 134946, 168035, 254190, 322335, 427338, 541054, 787264, 964969, 1340730, 1748094, 2311386 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Vaclav Kotesovec, Table of n, a(n) for n = 0..5000

MATHEMATICA

nmax = 50; CoefficientList[Series[Product[(1+k*x^k)/(1+x^k), {k, 1, nmax}], {x, 0, nmax}], x]

CROSSREFS

Cf. A022629, A267004, A267005, A268498, A268499.

Sequence in context: A295783 A060303 A099577 * A283824 A106168 A106166

Adjacent sequences:  A268497 A268498 A268499 * A268501 A268502 A268503

KEYWORD

nonn

AUTHOR

Vaclav Kotesovec, Feb 06 2016

STATUS

approved

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Last modified October 23 20:13 EDT 2019. Contains 328373 sequences. (Running on oeis4.)