A009226 - OEIS

%I #15 Apr 01 2017 12:00:04

%S 1,1,0,-1,4,17,-24,-201,848,7041,-25792,-291025,1491392,18979729,

%T -106879616,-1597285977,10504954112,176766161281,-1298259085312,

%U -24470008076193,200164547589120,4166922390589073,-37466482286032896

%N Expansion of e.g.f.: exp(sinh(x))/cosh(x).

%t With[{nn=30},CoefficientList[Series[Exp[Sinh[x]]/Cosh[x],{x,0,nn}],x]Range[0,nn]!] (* _Harvey P. Dale_, Sep 23 2012 *)

%K sign,easy

%O 0,5

%A _R. H. Hardin_

%E Extended with signs by _Olivier Gérard_, Mar 15 1997

%E Definition clarified by _Harvey P. Dale_, Sep 23 2012