%I #4 Feb 24 2012 12:50:49
%S 1,0,-1,-6,-15,20,255,70,-3423,46728,501375,-3625358,-60112239,
%T 420430556,9211149311,-79037179650,-2033765765567,18361020368016,
%U 572833991092479,-5418169914165654,-201869115241158607
%N cos(arctan(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-15/4!*x^4+20/5!*x^5...
%K sign
%O 0,4
%A Patrick Demichel (patrick.demichel(AT)hp.com)