OFFSET
0,4
FORMULA
a(n) ~ n! * (-1)^(n+1) / (sqrt(1-2*exp(Pi/2)+2*exp(Pi)) * log(1 - exp(-Pi/2) + sqrt(1 + (exp(-Pi/2)-1)^2))^(n+1)). - Vaclav Kotesovec, Jan 23 2015
MATHEMATICA
CoefficientList[Series[Tan[Log[1 + Sinh[x]]], {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jan 23 2015 *)
CROSSREFS
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
First Mathematica program deleted and definition clarified by Harvey P. Dale, Feb 20 2023
STATUS
approved