%I #4 Feb 24 2012 12:50:48
%S 1,0,-12,-360,-7280,504000,121581504,14369939584,56810973440,
%T -657138821830656,-255226784793623552,-45397358372525164544,
%U 15722139759017802895360,20152649683846086682296320
%N sech(tan(x)*arcsin(x))=1-12/4!*x^4-360/6!*x^6-7280/8!*x^8...
%K sign
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)