7869952
domain: N
Appears in sequences
- Generalized Euler numbers c(3,n).at n=4A000436
- Expansion of e.g.f. (sin x + cos x)/cos 3x.at n=8A000810
- Expansion of e.g.f. (sin(2*x) + cos(x)) / cos(3*x).at n=8A007289
- A bisection of A000436.at n=2A156177
- The first of three triangles counting 3-colored alternating permutations by their last value.at n=44A202692
- Shanks's array c_{a,n} (a >= 1, n >= 0) that generalizes Euler and class numbers, read by antidiagonals upwards.at n=25A235605