%I #4 Feb 24 2012 12:51:09
%S 1,-1,-11,-37,7145,450711,-3070179,-4923539597,-586954253103,
%T 57287087552943,41119408518068293,5965331366096594059,
%U -2749345524263504663367,-1905635088547220040309433
%N sech(sec(x)*sinh(x))=1-1/2!*x^2-11/4!*x^4-37/6!*x^6+7145/8!*x^8...
%K sign
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)