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

A009758

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

Terms

    a(0) =1a(1) =5a(2) =21a(3) =377a(4) =17161a(5) =442925a(6) =38819613a(7) =3394928609a(8) =307139569297

External references