arctanh(arcsin(tanh(x)))=x+1/3!*x^3+9/5!*x^5+169/7!*x^7+6513/9!*x^9...

A012130

arctanh(arcsin(tanh(x)))=x+1/3!*x^3+9/5!*x^5+169/7!*x^7+6513/9!*x^9...

Terms

    a(0) =1a(1) =1a(2) =9a(3) =169a(4) =6513a(5) =382449a(6) =33949369a(7) =4083320409a(8) =654225568353

External references