Expansion of e.g.f. tanh(arcsinh(x)*arctan(x)) (only even powers).

A012629

Expansion of e.g.f. tanh(arcsinh(x)*arctan(x)) (only even powers).

Terms

    a(0) =0a(1) =2a(2) =-12a(3) =-2a(4) =10248a(5) =-914598a(6) =58990140a(7) =390971670

External references