%I #6 Feb 26 2022 18:55:52
%S 2,-12,310,-17304,1700458,-258909860,56652535966,-16866155567408,
%T 6564236008307922,-3237559423419911996,1974150395798812732422,
%U -1458519974560491245318344,1283942399735883713487058746
%N arcsin(arctan(x)*sin(x))=2/2!*x^2-12/4!*x^4+310/6!*x^6-17304/8!*x^8...
%t With[{nn=30},Take[CoefficientList[Series[ArcSin[ArcTan[x]Sin[x]],{x,0,nn}],x] Range[0,nn]!,{3,-1,2}]] (* _Harvey P. Dale_, Feb 26 2022 *)
%K sign
%O 0,1
%A Patrick Demichel (patrick.demichel(AT)hp.com)