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cos(arctan(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-15/4!*x^4+20/5!*x^5...
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%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)