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%I #11 Apr 01 2017 11:46:29
%S 1,-1,2,-2,0,8,8,-184,192,5568,-20480,-231552,1837696,11751296,
%T -187743488,-596164352,22698672128,4342886400,-3236847570944,
%U 10035384119296,536307107184640,-3825733461393408,-101121059849109504
%N Expansion of cosh(x)/exp(tanh(x)).
%t Cosh[ x ]/Exp[ Tanh[ x ] ]
%K sign,easy
%O 0,3
%A _R. H. Hardin_
%E Extended with signs by _Olivier Gérard_, Mar 15 1997