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A009357 Expansion of log(1+sinh(x)*cos(x)). 1
0, 1, -1, 0, 2, -20, 104, -560, 2512, -7920, -32896, 1034880, -14979328, 172569280, -1684304896, 12339608320, -15173408768, -1902800305920, 53242752303104, -1037015219466240, 16518488951816192, -208832669083243520 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..21.

MATHEMATICA

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

CoefficientList[Series[Log[1 + Cos[x]*Sinh[x]], {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jan 24 2015 *)

CROSSREFS

Sequence in context: A222556 A103101 A267678 * A052361 A001884 A028477

Adjacent sequences:  A009354 A009355 A009356 * A009358 A009359 A009360

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 November 16 20:09 EST 2019. Contains 329205 sequences. (Running on oeis4.)