%I #4 Feb 24 2012 12:50:42
%S 1,5,121,6621,636337,94260341,19853570985,5628171840461,
%T 2063430523313761,949149114720943077,534861693803619166681,
%U 362197405161801586405565,290099119826974859032451601
%N sinh(tan(arctanh(x)))=x+5/3!*x^3+121/5!*x^5+6621/7!*x^7+636337/9!*x^9...
%K nonn
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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