tanh(arcsin(tanh(x)))=x-3/3!*x^3+41/5!*x^5-1243/7!*x^7+65681/9!*x^9...

A012129

tanh(arcsin(tanh(x)))=x-3/3!*x^3+41/5!*x^5-1243/7!*x^7+65681/9!*x^9...

Terms

    a(0) =1a(1) =-3a(2) =41a(3) =-1243a(4) =65681a(5) =-5335283a(6) =616216121a(7) =-95919970123

External references