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%I #4 Feb 24 2012 12:51:03
%S 2,-12,-2,10248,-914598,58990140,390971670,-1399074591600,
%T 414051949573170,-75189740418805500,-1988456671385842770,
%U 10786170755283590925720,-6649588570098570005749110
%N tanh(arcsinh(x)*arctan(x))=2/2!*x^2-12/4!*x^4-2/6!*x^6+10248/8!*x^8...
%K sign
%O 0,1
%A Patrick Demichel (patrick.demichel(AT)hp.com)