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%I #6 Mar 30 2012 17:26:41
%S 2,362,1441682,32555086202,2447023018597922,462534850269339720842,
%T 184789477601927787169878962,138612178386831070025588251376282,
%U 179134512141830902349787461672276596802
%N arctanh(sec(x)-sech(x))=2/2!*x^2+362/6!*x^6+1441682/10!*x^10...
%K nonn
%O 0,1
%A Patrick Demichel (patrick.demichel(AT)hp.com)
%E More terms from _Max Alekseyev_, Feb 06 2010
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