arctanh(arctan(arcsinh(x)))=x-1/3!*x^3+17/5!*x^5-617/7!*x^7+44417/9!*x^9...

A012219

arctanh(arctan(arcsinh(x)))=x-1/3!*x^3+17/5!*x^5-617/7!*x^7+44417/9!*x^9...

Terms

    a(0) =1a(1) =-1a(2) =17a(3) =-617a(4) =44417a(5) =-5210129a(6) =909126033a(7) =-220910314809

External references