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%I #7 Nov 21 2013 12:46:01
%S 1,2,40,1192,87680,9890432,1736725120,424537276672,139089326735360,
%T 58613115790118912,30905365440751206400,19924657840958605361152,
%U 15419390055940961625866240,14105236549373087746555707392
%N arcsin(sec(x)*tanh(x))=x+2/3!*x^3+40/5!*x^5+1192/7!*x^7+87680/9!*x^9...
%t nn=27;Select[CoefficientList[Series[ArcSin[Sec[x]Tanh[x]],{x,0,nn}], x]Range[0,nn]!,#!=0&] (* _Harvey P. Dale_, Jul 26 2011 *)
%K nonn
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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