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A009407
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Expansion of log(1+x)*cos(sinh(x)).
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0
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0, 1, -1, -1, 0, -11, 15, 27, -504, 7785, -74025, 835735, -9654216, 121643677, -1646734089, 23833558707, -368032192080, 6033531089873, -104751319907313, 1920112851095471, -37066806679606640, 751794216181100869
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OFFSET
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0,6
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LINKS
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Table of n, a(n) for n=0..21.
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FORMULA
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a(n) ~ (n-1)! * (-1)^(n+1) * cos(sinh(1)). - Vaclav Kotesovec, Jan 24 2015
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MATHEMATICA
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Log[ 1+x ]*Cos[ Sinh[ x ] ]
CoefficientList[Series[Cos[Sinh[x]]*Log[1 + x], {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jan 24 2015 *)
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CROSSREFS
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Sequence in context: A054280 A214863 A094766 * A009433 A275242 A030099
Adjacent sequences: A009404 A009405 A009406 * A009408 A009409 A009410
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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
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STATUS
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approved
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