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A009519
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Expansion of e.g.f.: sin(tanh(log(1+x))).
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0
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0, 1, -1, -1, 12, -44, 0, 1364, -11312, 34588, 378900, -7237396, 57785376, -13438424, -7111845832, 116461238984, -835329363840, -6161526961904, 288993527986032, -4444723274423248, 22035938200252480, 733027816359058816
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history;
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internal format)
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OFFSET
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0,5
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LINKS
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Table of n, a(n) for n=0..21.
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MATHEMATICA
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With[{nn=30}, CoefficientList[Series[Sin[Tanh[Log[1+x]]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Apr 23 2020 *)
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CROSSREFS
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Sequence in context: A012471 A116187 A009790 * A106808 A296181 A007899
Adjacent sequences: A009516 A009517 A009518 * A009520 A009521 A009522
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KEYWORD
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sign,easy
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AUTHOR
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R. H. Hardin
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EXTENSIONS
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Extended with signs by Olivier Gérard, Mar 15 1997
Prior Mathematica program replaced and definition clarified by Harvey P. Dale, Apr 23 2020
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STATUS
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approved
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