arcsinh(arcsin(arctanh(x)))=x+2/3!*x^3+32/5!*x^5+1336/7!*x^7...

A012140

arcsinh(arcsin(arctanh(x)))=x+2/3!*x^3+32/5!*x^5+1336/7!*x^7...

Terms

    a(0) =1a(1) =2a(2) =32a(3) =1336a(4) =108800a(5) =14701312a(6) =2986596480a(7) =852635258112

External references