|
%I #13 Jun 23 2015 21:44:14
%S 0,1,-1,-1,0,-11,15,27,-504,11817,-94185,1226455,-12442056,155936221,
%T -1995562569,27870901107,-423463160400,6793396567633,-117302680146033,
%U 2130615128588591,-40960288523646320,827190717641773765
%N Expansion of log(1+x)/cosh(tan(x)).
%F a(n) ~ (n-1)! * (-1)^(n+1) / cosh(tan(1)). - _Vaclav Kotesovec_, Jan 23 2015
%t Log[ 1+x ]/Cosh[ Tan[ x ] ]
%t CoefficientList[Series[Log[1 + x]*Sech[Tan[x]], {x, 0, 20}], x] * Range[0, 20]! (* _Vaclav Kotesovec_, Jan 23 2015 *)
%K sign,easy
%O 0,6
%A _R. H. Hardin_
%E Extended with signs by _Olivier Gérard_, Mar 15 1997
|
