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

A009701

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

Terms

    a(0) =1a(1) =7a(2) =137a(3) =5535a(4) =386481a(5) =41604055a(6) =6390472441

External references