%I #4 Feb 24 2012 12:51:19
%S 1,0,4,-6,19,-140,814,-5082,43509,-400248,3812904,-42180270,520553895,
%T -6701464068,92507196786,-1398195467970,22513722221865,
%U -380979724310896,6839735642061708,-130277805146941014
%N cosh(tanh(x)+log(x+1))=1+4/2!*x^2-6/3!*x^3+19/4!*x^4-140/5!*x^5...
%K sign
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)