E.g.f. tan(tan(x)*sin(x)), even powers only.

A009705

E.g.f. tan(tan(x)*sin(x)), even powers only.

Terms

    a(0) =0a(1) =2a(2) =4a(3) =302a(4) =8104a(5) =947642a(6) =86855404a(7) =16203909542

External references