Expansion of e.g.f. x/cos(x) (odd powers only).

A009843

Expansion of e.g.f. x/cos(x) (odd powers only).

Terms

    a(0) =1a(1) =3a(2) =25a(3) =427a(4) =12465a(5) =555731a(6) =35135945a(7) =2990414715a(8) =329655706465

External references