%I #4 Feb 24 2012 12:50:36
%S 1,0,-4,-192,-7600,-507136,-40159040,-4621348864,-627047126784,
%T -113424912867328,-23612736247718912,-6196586681702039552,
%U -1827473399583593672704,-652336666072894806360064
%N arcsinh(sin(tan(x)))=x-4/5!*x^5-192/7!*x^7-7600/9!*x^9-507136/11!*x^11...
%K sign
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)