Expansion of e.g.f. arctanh(x*sec(x)) (odd powers only).

A296743

Expansion of e.g.f. arctanh(x*sec(x)) (odd powers only).

Terms

    a(0) =1a(1) =5a(2) =109a(3) =5977a(4) =612729a(5) =100954061a(6) =24395453861

External references