%I #4 Feb 24 2012 12:51:15
%S 2,-8,328,-32608,6483328,-2134642688,1052574333952,-725748770065408,
%T 666646160260988928,-786828198376481390592,1160307802288187922251776,
%U -2090565114493628148202864640
%N arcsinh(arctan(x)+tan(x))=2*x-8/3!*x^3+328/5!*x^5-32608/7!*x^7...
%K sign
%O 0,1
%A Patrick Demichel (patrick.demichel(AT)hp.com)