%I #4 Feb 24 2012 12:51:21
%S 1,0,4,-6,115,-500,8830,-70770,1316825,-15886440,324218600,
%T -5249917750,119185529675,-2412502361100,61104527105050,
%U -1476059511449250,41607421213320625,-1162370434739930000
%N sec(arctanh(x)+log(x+1))=1+4/2!*x^2-6/3!*x^3+115/4!*x^4-500/5!*x^5...
%K sign
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)