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%I #6 May 07 2021 17:02:40
%S 1,1,9,393,33009,4410033,872617017,240500373753,88094910348129,
%T 41401437242599905,24287046275803547625,17396048031084882189033,
%U 14941352753081733849348945,15157924050230673397966293393
%N arctan(arcsin(tan(x)))=x+1/3!*x^3+9/5!*x^5+393/7!*x^7+33009/9!*x^9...
%t With[{nn=30},Take[CoefficientList[Series[ArcTan[ArcSin[Tan[x]]],{x,0,nn}],x] Range[0,nn-1]!,{2,-1,2}]] (* _Harvey P. Dale_, May 07 2021 *)
%K nonn
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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