arctanh(sin(tanh(x)))=x-1/3!*x^3+1/5!*x^5+55/7!*x^7-2207/9!*x^9...
A012048
arctanh(sin(tanh(x)))=x-1/3!*x^3+1/5!*x^5+55/7!*x^7-2207/9!*x^9...
Terms
- a(0) =1a(1) =-1a(2) =1a(3) =55a(4) =-2207a(5) =79727a(6) =-2834207a(7) =81045991a(8) =1107720001a(9) =-715785186337
External references
- oeis: A012048