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%I #4 Feb 24 2012 12:51:08
%S 1,2,-20,-1104,-23728,2048224,394518592,28921612032,-3968669081344,
%T -2038929577444864,-347998546570798080,59058720637105172480,
%U 67936182152875665510400,22515279368057454566531072
%N tanh(sec(x)*arcsin(x))=x+2/3!*x^3-20/5!*x^5-1104/7!*x^7-23728/9!*x^9...
%K sign
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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