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%I #7 Nov 21 2013 12:46:00
%S 1,0,12,248,21648,2241088,390536000,91111189120,28811937609984,
%T 11657540060256256,5912796798580972544,3665610214092467574784,
%U 2729315998404117133692928,2402622277659457905178820608
%N arctan(arcsin(arcsin(x)))=x+12/5!*x^5+248/7!*x^7+21648/9!*x^9...
%t With[{nn=30},Take[CoefficientList[Series[ArcTan[ArcSin[ArcSin[x]]],{x,0,nn}], x] Range[0,nn-1]!,{2,-1,2}]] (* _Harvey P. Dale_, Dec 09 2011 *)
%K nonn
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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