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A009352
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E.g.f: log(1+sinh(x))*cosh(x).
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1
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0, 1, -1, 6, -16, 80, -421, 2800, -21736, 194304, -1961521, 22060544, -273408136, 3701321728, -54335326501, 859630860288, -14579917279216, 263892101169152, -5076781293615361, 103444435675512832, -2225448965436594976
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,4
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LINKS
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FORMULA
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a(n) ~ (n-1)! * (-1)^(n+1) * sqrt(2) / (log(1+sqrt(2)))^n. - Vaclav Kotesovec, Jan 23 2015
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MATHEMATICA
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With[{nn=30}, CoefficientList[Series[Log[1+Sinh[x]]Cosh[x], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jun 04 2013 *)
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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 clarified and Mathematica program replaced by Harvey P. Dale, Jun 04 2013
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STATUS
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approved
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