tanh(arctan(x)+sin(x))=2*x-19/3!*x^3+777/5!*x^5-69137/7!*x^7...

A012980

tanh(arctan(x)+sin(x))=2*x-19/3!*x^3+777/5!*x^5-69137/7!*x^7...

Terms

    a(0) =2a(1) =-19a(2) =777a(3) =-69137a(4) =10638417a(5) =-2507750617a(6) =839139592969

External references