arctan(arctan(x)+tan(x))=2*x-16/3!*x^3+808/5!*x^5-99328/7!*x^7...

A013000

arctan(arctan(x)+tan(x))=2*x-16/3!*x^3+808/5!*x^5-99328/7!*x^7...

Terms

    a(0) =2a(1) =-16a(2) =808a(3) =-99328a(4) =22756480a(5) =-8373489408

External references