A012504 - OEIS

%I #4 Feb 24 2012 12:50:52

%S 1,-7,165,-9931,1037033,-167246319,38489315917,-11958291252467,

%T 4819985549046353,-2445005516326951767,1523950240372673482357,

%U -1144729097700954584840347,1019812687197159075947289145

%N tanh(cos(x)*arctan(x))=x-7/3!*x^3+165/5!*x^5-9931/7!*x^7...

%K sign

%O 0,2

%A Patrick Demichel (patrick.demichel(AT)hp.com)