tanh(arcsinh(x)+arctan(x))=2*x-19/3!*x^3+785/5!*x^5-70705/7!*x^7...

A013110

tanh(arcsinh(x)+arctan(x))=2*x-19/3!*x^3+785/5!*x^5-70705/7!*x^7...

Terms

    a(0) =2a(1) =-19a(2) =785a(3) =-70705a(4) =11020385a(5) =-2631928825a(6) =892329853025

External references