arcsinh(arcsin(tanh(x)))=x-2/3!*x^3+24/5!*x^5-776/7!*x^7+49536/9!*x^9...

A012128

arcsinh(arcsin(tanh(x)))=x-2/3!*x^3+24/5!*x^5-776/7!*x^7+49536/9!*x^9...

Terms

    a(0) =1a(1) =-2a(2) =24a(3) =-776a(4) =49536a(5) =-5271936a(6) =842846848a(7) =-188826614016

External references