tanh(arcsinh(x)*cos(x))=x-6/3!*x^3+120/5!*x^5-6216/7!*x^7...

A012641

tanh(arcsinh(x)*cos(x))=x-6/3!*x^3+120/5!*x^5-6216/7!*x^7...

Terms

    a(0) =1a(1) =-6a(2) =120a(3) =-6216a(4) =548544a(5) =-74860544a(6) =14571230336

External references