%I #4 Feb 24 2012 12:51:15
%S 2,8,72,3040,64896,10595840,87854080,170663275520,-13108265091072,
%T 9548887177330688,-2414396189767565312,1470934245912869601280,
%U -706590338221690516406272,502826356422039379298484224
%N sinh(arctan(x)+tan(x))=2*x+8/3!*x^3+72/5!*x^5+3040/7!*x^7...
%K sign
%O 0,1
%A Patrick Demichel (patrick.demichel(AT)hp.com)