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%I #4 Feb 24 2012 12:50:52
%S 1,-1,25,-1105,91313,-12232385,2400320393,-649247356433,
%T 231544408317537,-105271075840787713,59429582363323624185,
%U -40787189186519841731153,33444147237661076070865681
%N sech(cos(x)*arctan(x))=1-1/2!*x^2+25/4!*x^4-1105/6!*x^6+91313/8!*x^8...
%K sign
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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