%I #10 Nov 21 2013 12:46:01
%S 2,-16,488,-30336,3303072,-556926720,135234491520,-44790227865600,
%T 19434264780034560,-10703464305128755200,7296385856008015226880,
%U -6031102564833737842851840,5942962739028147945628999680
%N arcsin(arctan(x)^2) = 2/2!*x^2 - 16/4!*x^4 + 488/6!*x^6 - 30336/8!*x^8...
%t With[{nn=30}, Take[CoefficientList[Series[ArcSin[ArcTan[x]^2], {x,0,nn}], x] Range[0,nn]!, {3,-1,2}]] (* _Harvey P. Dale_, Dec 13 2011 *)
%K sign
%O 0,1
%A Patrick Demichel (patrick.demichel(AT)hp.com)
%E Definition corrected by Harvey P. Dale, Dec 13 2011