515086

Appears in sequences

• Generalized tangent numbers d(3, n).at n=3A000191
• Generalized tangent numbers d_(n,4).at n=2A000518
• Expansion of e.g.f. (sin(2*x) + cos(x)) / cos(3*x).at n=7A007289
• Shanks's array d_{a,n} (a >= 1, n >= 1) that generalizes the tangent numbers, read by antidiagonals upwards.at n=18A235606
• Array A(n, k) that generalizes Euler numbers, class numbers, and tangent numbers, read by ascending antidiagonals.at n=52A349271