Expansion of e.g.f. tan(x)*tan(tan(x))/2 (even powers only).

A024297

Expansion of e.g.f. tan(x)*tan(tan(x))/2 (even powers only).

Terms

    a(0) =0a(1) =1a(2) =12a(3) =344a(4) =18496a(5) =1617152a(6) =209249792a(7) =37538874368

External references