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Expansion of tan(tanh(x))*x.
1

%I #11 Apr 02 2017 12:10:28

%S 0,2,0,-48,896,-1280,-1317888,113985536,-5662048256,-173996310528,

%T 103038851481600,-18151624725757952,1834297840675848192,

%U 53334014587534573568,-66117477689491873333248

%N Expansion of tan(tanh(x))*x.

%t Tan[ Tanh[ x ] ]*x (* Even Part *)

%K sign

%O 0,2

%A _R. H. Hardin_

%E Extended with signs by _Olivier GĂ©rard_, Mar 15 1997