arctan(arcsin(tanh(x)))=x-3/3!*x^3+49/5!*x^5-1971/7!*x^7+147457/9!*x^9...

A012126

arctan(arcsin(tanh(x)))=x-3/3!*x^3+49/5!*x^5-1971/7!*x^7+147457/9!*x^9...

Terms

    a(0) =1a(1) =-3a(2) =49a(3) =-1971a(4) =147457a(5) =-17712131a(6) =3119521521a(7) =-757475512691

External references