tan(sin(arctanh(x)))=x+3/3!*x^3+41/5!*x^5+1187/7!*x^7+54449/9!*x^9...

A012053

tan(sin(arctanh(x)))=x+3/3!*x^3+41/5!*x^5+1187/7!*x^7+54449/9!*x^9...

Terms

    a(0) =1a(1) =3a(2) =41a(3) =1187a(4) =54449a(5) =3092867a(6) =95391193a(7) =-48911197853

External references