A012434 - OEIS

%I #6 May 04 2013 14:53:42

%S 2,-4,278,-6984,1148202,-99018060,28635818430,-5588393370000,

%T 2487224151815250,-886910985311966100,563430775878809461350,

%U -321709990033199535312600,277763298278504193429092730

%N arcsin(arctan(x)*arcsin(x))=2/2!*x^2-4/4!*x^4+278/6!*x^6-6984/8!*x^8...

%t With[{nn=30},Take[CoefficientList[Series[ArcSin[ArcTan[x]ArcSin[x]],{x,0,nn}], x] Range[0,nn]!,{3,-1,2}]] (* _Harvey P. Dale_, May 04 2013 *)

%K sign

%O 0,1

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