297296
domain: N
Appears in sequences
- Expansion of e.g.f. (sin x + cos x)/cos 3x.at n=7A000810
- E.g.f.: (sin x + cos 2x) / cos 3x.at n=7A007286
- Number of perfect matchings in graph P_{2} X C_{6} X P_{n}.at n=3A028458
- Numbers A such that the square of concatenation AA is of form NNMM.at n=22A107677
- The first of three triangles counting 3-colored alternating permutations by their last value.at n=35A202692
- a(n) = pg(3, n) + pg(4, n) + ... + pg(n, n) where pg(m, n) is the n-th m-th-order polygonal number.at n=34A241452
- Triangle read by rows, generalized Eulerian polynomials evaluated at x = -1.at n=31A337996
- Numbers k such that k and k+1 are both S-abundant numbers (A181487).at n=33A364861