OFFSET
0,4
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..200
FORMULA
a(n) ~ n! * (-1)^n / (GAMMA(-1/cosh(1)) * n^(1+1/cosh(1))). - Vaclav Kotesovec, Jul 02 2015
MATHEMATICA
CoefficientList[Series[Exp[Log[1+x]/Cosh[x]], {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jul 02 2015 *)
CROSSREFS
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
STATUS
approved