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A009413 Expansion of log(1+x)*cosh(sinh(x)). 0
0, 1, -1, 5, -12, 69, -285, 1833, -11536, 91689, -782865, 7685325, -82339884, 973147629, -12466581309, 172666976433, -2565893101440, 40742019960785, -688062399893505, 12315242802523797, -232832786354392620 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..20.

FORMULA

a(n) ~ (n-1)! * (-1)^(n+1) * cosh(sinh(1)). - Vaclav Kotesovec, Jan 23 2015

MATHEMATICA

Log[ 1+x ]*Cosh[ Sinh[ x ] ]

CoefficientList[Series[Cosh[Sinh[x]]*Log[1 + x], {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jan 23 2015 *)

CROSSREFS

Sequence in context: A129723 A219770 A246176 * A009429 A207821 A297644

Adjacent sequences:  A009410 A009411 A009412 * A009414 A009415 A009416

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved

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Last modified May 25 12:00 EDT 2022. Contains 354071 sequences. (Running on oeis4.)