%I #4 Feb 24 2012 12:51:19
%S 1,4,56,1990,130280,13814650,2137954100,457685029750,128915903246000,
%T 46370152422675250,20689120752785127500,11232151174947132868750,
%U 7281395066161326989645000,5560840304175437693730906250
%N sec(arcsinh(x)+arctan(x))=1+4/2!*x^2+56/4!*x^4+1990/6!*x^6...
%K nonn
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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