A012980 - OEIS

%I #4 Feb 24 2012 12:51:14

%S 2,-19,777,-69137,10638417,-2507750617,839139592969,-378121773804337,

%T 220718283821767713,-162004120310722473001,146031595896623765319193,

%U -158588958155287462968094529,204221537438129307495799630193

%N tanh(arctan(x)+sin(x))=2*x-19/3!*x^3+777/5!*x^5-69137/7!*x^7...

%K sign

%O 0,1

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