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A009328 Expansion of log(1+sin(sinh(x))). 0
0, 1, -1, 2, -6, 16, -72, 328, -1904, 12160, -89344, 721280, -6445824, 62638720, -660602880, 7495723264, -91175548928, 1182630301696, -16301080281088, 237887012458496, -3664597991424000, 59422015832915968 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,4
LINKS
FORMULA
a(n) ~ (n-1)! * 2 * (-1)^(n+1) / (log((Pi+sqrt(4+Pi^2))/2))^n. - Vaclav Kotesovec, Jan 23 2015
MATHEMATICA
Log[ 1+Sin[ Sinh[ x ] ] ]
CoefficientList[Series[Log[1 + Sin[Sinh[x]]], {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jan 23 2015 *)
CROSSREFS
Sequence in context: A009605 A009681 A009186 * A009346 A009367 A114249
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
STATUS
approved

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Last modified May 25 01:50 EDT 2024. Contains 372782 sequences. (Running on oeis4.)