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%I #4 Feb 24 2012 12:51:18
%S 1,4,80,4120,394880,61069600,13845756800,4331363670400,
%T 1786609560320000,939754328209216000,613833877949676800000,
%U 487486352498634760960000,462560462591422971975680000
%N sec(arcsinh(x)+arcsin(x))=1+4/2!*x^2+80/4!*x^4+4120/6!*x^6...
%K nonn
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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