exp(arcsinh(tanh(x))) = 1+x+1/2!*x^2-2/3!*x^3-11/4!*x^4+16/5!*x^5...

A012253

exp(arcsinh(tanh(x))) = 1+x+1/2!*x^2-2/3!*x^3-11/4!*x^4+16/5!*x^5...

Terms

    a(0) =1a(1) =1a(2) =1a(3) =-2a(4) =-11a(5) =16a(6) =301a(7) =-272a(8) =-16631a(9) =7936a(10) =1620601a(11) =-353792a(12) =-250557251a(13) =22368256a(14) =56629836901a(15) =-1903757312a(17) =209865342976

External references