Expansion of e.g.f. exp(x*arctanh(x)) (even powers only).

A296789

Expansion of e.g.f. exp(x*arctanh(x)) (even powers only).

Terms

    a(0) =1a(1) =2a(2) =20a(3) =504a(4) =24464a(5) =1959840a(6) =234852672a(7) =39370660224

External references