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%I #14 Apr 02 2017 12:07:39
%S 0,2,12,118,536,-116246,-16364252,-2126232482,-306170653648,
%T -50385573229614,-9466502482856388,-2005520046878244794,
%U -469486134481963893176,-117587958866855549958726
%N Expansion of tan(x)*sin(tan(x)).
%t Tan[ x ]*Sin[ Tan[ x ] ] (* Even Part *)
%t nn = 20; Table[(CoefficientList[Series[Sin[Tan[x]]*Tan[x], {x, 0, 2*nn}], x] * Range[0, 2*nn]!)[[n]], {n, 1, 2*nn+1, 2}] (* _Vaclav Kotesovec_, Jan 24 2015 *)
%K sign
%O 0,2
%A _R. H. Hardin_
%E Extended with signs by _Olivier Gérard_, Mar 15 1997