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 A009779 Expansion of e.g.f.: tanh(log(1+x))*log(1+x). 1
 0, 0, 2, -6, 14, -20, -36, 336, 720, -38016, 524160, -5448960, 50388480, -465903360, 5010888960, -69353625600, 1155961497600, -20593469030400, 370356373094400, -6695551947571200, 124010190839808000, -2408196729028608000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS FORMULA a(n) ~ (n-1)! * (-1)^n. - Vaclav Kotesovec, Jan 24 2015 MATHEMATICA CoefficientList[Series[(x*(2 + x)*Log[1 + x])/(2 + x*(2 + x)), {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jan 24 2015 *) With[{nn=30}, CoefficientList[Series[Tanh[Log[1+x]]*Log[1+x], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Aug 26 2020 *) CROSSREFS Sequence in context: A067262 A107369 A151731 * A086666 A032383 A014775 Adjacent sequences:  A009776 A009777 A009778 * A009780 A009781 A009782 KEYWORD sign,easy AUTHOR EXTENSIONS Extended with signs by Olivier Gérard, Mar 15 1997 Definition clarified and first Mathematica program replaced by Harvey P. Dale, Aug 26 2020 STATUS approved

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Last modified November 30 02:42 EST 2020. Contains 338781 sequences. (Running on oeis4.)