135274562

Appears in sequences

• Generalized tangent numbers d(3, n).at n=4A000191
• Expansion of e.g.f. (sin(2*x) + cos(x)) / cos(3*x).at n=9A007289
• a(n) = Im((1-I)^(1-n)*A_{n, 3}(I)) where A_{n, k}(x) are the generalized Eulerian polynomials.at n=9A225147
• Shanks's array d_{a,n} (a >= 1, n >= 1) that generalizes the tangent numbers, read by antidiagonals upwards.at n=25A235606