tanh(arcsin(arctanh(x)))=x+1/3!*x^3+9/5!*x^5+281/7!*x^7+20913/9!*x^9...
A012141
tanh(arcsin(arctanh(x)))=x+1/3!*x^3+9/5!*x^5+281/7!*x^7+20913/9!*x^9...
Terms
- a(0) =1a(1) =1a(2) =9a(3) =281a(4) =20913a(5) =2869329a(6) =613734393a(7) =185272366761
External references
- oeis: A012141