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%I A012370 #6 Mar 06 2019 11:27:36
%S A012370 2,4,-58,-1976,116042,17175244,-594271858,-470273780336,
%T A012370 -11672416091758,34320709687067284,5944386529990688342,
%U A012370 -5070047337737884665896,-2469435785086687214539558
%N A012370 arcsinh(tan(x)*sin(x))=2/2!*x^2+4/4!*x^4-58/6!*x^6-1976/8!*x^8...
%t A012370 With[{nn=30},Take[CoefficientList[Series[ArcSinh[Tan[x]Sin[x]],{x,0,nn}],x] Range[0,nn]!,{3,-1,2}]] (* _Harvey P. Dale_, Mar 06 2019 *)
%K A012370 sign
%O A012370 0,1
%A A012370 Patrick Demichel (patrick.demichel(AT)hp.com)

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