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%I #6 Jul 22 2019 18:11:10
%S -1,-7,-47,3369,571573,88260053,16352313521,3805010266353,
%T 1114309660688557,405568733333445837,180263147441643275337,
%U 96121395297143070311401,60524878000846286453504453
%N arcsinh(arcsin(x)-tan(x))=-1/3!*x^3-7/5!*x^5-47/7!*x^7+3369/9!*x^9...
%t With[{nn=30},Take[CoefficientList[Series[ArcSinh[ArcSin[x]-Tan[x]],{x,0,nn}],x] Range[0,nn-1]!,{4,-1,2}]] (* _Harvey P. Dale_, Jul 22 2019 *)
%K sign
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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