OFFSET
0,5
LINKS
Harvey P. Dale, Table of n, a(n) for n = 0..150
FORMULA
a(n) ~ n! * (-1)^(n+1) * tanh(1-exp(-Pi/2)) / ((exp(Pi/2)-1) * (1-exp(-Pi/2))^n). - Vaclav Kotesovec, Jan 24 2015
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Tanh[x]/Cos[Log[1+x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Aug 07 2013 *)
CROSSREFS
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
Definition clarified and prior Mathematica program replaced by Harvey P. Dale, Aug 07 2013
STATUS
approved