tanh(sin(arctanh(x)))=x-1/3!*x^3+1/5!*x^5-57/7!*x^7-3167/9!*x^9...

A012058

tanh(sin(arctanh(x)))=x-1/3!*x^3+1/5!*x^5-57/7!*x^7-3167/9!*x^9...

Terms

    a(0) =1a(1) =-1a(2) =1a(3) =-57a(4) =-3167a(5) =-362737a(6) =-56653791a(7) =-11948396137

External references