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%I #6 Jul 16 2016 08:44:40
%S 2,12,70,-4200,-347702,8053540,8370022414,1537444327216,
%T -75026900539758,-163917764618098628,-46635653602838486826,
%U 19561200248822504710856,28903055462807082203920986
%N arcsinh(tan(x)*arcsin(x))=2/2!*x^2+12/4!*x^4+70/6!*x^6-4200/8!*x^8...
%t With[{nn=30},Take[CoefficientList[Series[ArcSinh[Tan[x]ArcSin[x]],{x,0,nn}],x] Range[0,nn]!,{3,-1,2}]] (* _Harvey P. Dale_, Jul 16 2016 *)
%K sign
%O 0,1
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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