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A009407
Expansion of log(1+x)*cos(sinh(x)).
0
0, 1, -1, -1, 0, -11, 15, 27, -504, 7785, -74025, 835735, -9654216, 121643677, -1646734089, 23833558707, -368032192080, 6033531089873, -104751319907313, 1920112851095471, -37066806679606640, 751794216181100869
OFFSET
0,6
FORMULA
a(n) ~ (n-1)! * (-1)^(n+1) * cos(sinh(1)). - Vaclav Kotesovec, Jan 24 2015
MATHEMATICA
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 *)
CROSSREFS
Sequence in context: A054280 A214863 A094766 * A009433 A275242 A030099
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
STATUS
approved