arctanh(arcsin(sinh(x)))=x+4/3!*x^3+84/5!*x^5+4432/7!*x^7+432144/9!*x^9...

A012107

arctanh(arcsin(sinh(x)))=x+4/3!*x^3+84/5!*x^5+4432/7!*x^7+432144/9!*x^9...

Terms

    a(0) =1a(1) =4a(2) =84a(3) =4432a(4) =432144a(5) =67336512a(6) =15330202432

External references