arctan(arcsinh(x)+arctan(x))=2*x-19/3!*x^3+1041/5!*x^5-141489/7!*x^7...

A013107

arctan(arcsinh(x)+arctan(x))=2*x-19/3!*x^3+1041/5!*x^5-141489/7!*x^7...

Terms

    a(0) =2a(1) =-19a(2) =1041a(3) =-141489a(4) =35842401a(5) =-14587836921

External references