A012334 - OEIS

%I #6 Jul 21 2023 13:01:38

%S 2,0,-80,1344,256768,478720,-2027088128,273426399232,158140462424064,

%T -1238001757208576,-9930099869342171136,4752907831646575394816,

%U 4870481397825377085751296

%N arcsinh(arcsin(x)*sin(x))=2/2!*x^2-80/6!*x^6+1344/8!*x^8+256768/10!*x^10...

%t With[{nn=30},Take[CoefficientList[Series[ArcSinh[ArcSin[x]Sin[x]],{x,0,nn}],x] Range[0,nn]!,{3,-1,2}]] (* _Harvey P. Dale_, Jul 21 2023 *)

%K sign

%O 0,1

%A Patrick Demichel (patrick.demichel(AT)hp.com)