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%I #18 Jun 21 2015 21:52:08
%S 1,0,2,-3,19,-90,556,-3885,31109,-279972,2799766,-30797415,369569047,
%T -4804397598,67261566464,-1008923496945,16142775951241,
%U -274427191171080,4939689441079594,-93854099380512267,1877081987610245531
%N Expansion of cosh(x)*cosh(log(1+x)).
%F a(n) ~ n! * (-1)^n * (exp(-1) + exp(1))/4. - _Vaclav Kotesovec_, Jan 22 2015
%t With[{nn=20},CoefficientList[Series[Cosh[x]Cosh[Log[1+x]],{x,0,nn}], x]Range[0,nn]!] (* _Harvey P. Dale_, Feb 02 2012 *)
%K sign,easy
%O 0,3
%A _R. H. Hardin_
%E Extended with signs by _Olivier Gérard_, Mar 15 1997
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