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%I #13 May 27 2022 11:47:37
%S 0,2,4,-18,-2200,-150150,-11618004,-1078005082,-118928710576,
%T -15184771406478,-2148536703814700,-309605570133329954,
%U -34193099991177752904,4268254817856544829418,6637048590856623019431932
%N Expansion of sin(tan(x))*x.
%t With[{nn=30},Take[CoefficientList[Series[Sin[Tan[x]]x,{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, May 27 2022 *)
%K sign
%O 0,2
%A _R. H. Hardin_
%E Extended with signs by _Olivier Gérard_, Mar 15 1997
%E Previous Mathematica program replaced by _Harvey P. Dale_, May 27 2022