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A009333 Expansion of log(1+sin(x))*cosh(x). 0
0, 1, -1, 4, -8, 20, -61, 208, -888, 4304, -24001, 149312, -1028048, 7745088, -63374221, 559452416, -5299033488, 53597321472, -576514338721, 6570832389120, -79100066353208, 1002840464045056, -13355627237749501, 186406420596609024 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..23.

FORMULA

a(n) ~ (n-1)! * (-1)^(n+1) * cosh(Pi/2) * 2^(n+1) / Pi^n. - Vaclav Kotesovec, Jan 23 2015

MATHEMATICA

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

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

CROSSREFS

Sequence in context: A123861 A115099 A060919 * A187010 A240149 A086912

Adjacent sequences:  A009330 A009331 A009332 * A009334 A009335 A009336

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 23 17:10 EST 2020. Contains 338595 sequences. (Running on oeis4.)