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A009783
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Expansion of e.g.f.: tanh(log(1+x)*cos(x)).
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0
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0, 1, -1, -3, 12, 15, -375, 819, 13888, -108483, -551925, 13545961, -22418484, -1621656517, 14484838277, 186206989903, -4523278283040, -3719219044807, 1200472177117815, -10141780669451755, -290942811953148500
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OFFSET
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0,4
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LINKS
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MATHEMATICA
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With[{nn=20}, CoefficientList[Series[Tanh[Log[1+x]*Cos[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jun 30 2021 *)
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CROSSREFS
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KEYWORD
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sign,easy
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AUTHOR
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EXTENSIONS
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Definition (Name) clarified by and previous Mathematica program replaced by Harvey P. Dale, Jun 30 2021
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STATUS
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approved
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