arcsinh(arctan(tanh(x)))=x-5/3!*x^3+129/5!*x^5-8189/7!*x^7...

A012226

arcsinh(arctan(tanh(x)))=x-5/3!*x^3+129/5!*x^5-8189/7!*x^7...

Terms

    a(0) =1a(1) =-5a(2) =129a(3) =-8189a(4) =972609a(5) =-186825429a(6) =53036534017

External references