Expansion of tan(tan(x))*cos(x) (odd powers only).

A009695

Expansion of tan(tan(x))*cos(x) (odd powers only).

Terms

    a(0) =1a(1) =1a(2) =37a(3) =1517a(4) =108393a(5) =11820345a(6) =1828543693a(7) =380880450277

External references