%I #6 Jul 21 2015 15:33:04
%S 4,0,544,-17920,707584,-149360640,5242548224,-2782416732160,
%T 166243180478464,-109528131284500480,13239205658628194304,
%U -8328889253838297497600,1938205426199431158431744
%N sin(tan(x)-tanh(x))=4/3!*x^3+544/7!*x^7-17920/9!*x^9+707584/11!*x^11...
%t With[{nn=30},Take[CoefficientList[Series[Sin[Tan[x]-Tanh[x]],{x,0,nn}],x] Range[0,nn-1]!,{4,-1,2}]] (* _Harvey P. Dale_, Jul 21 2015 *)
%K sign
%O 0,1
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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