288294050521
domain: N
Appears in sequences
- E.g.f.: (1+sqrt(2)*sin(x/sqrt(2))*cosh(x/sqrt(2))+sin(x/sqrt(2))*sinh(x/sqrt(2)))/(cos(x/sqrt(2))*cosh(x/sqrt(2))).at n=20A178964
- Generalized Euler numbers. Square array A(n,k), n >= 1, k >= 0, read by antidiagonals. A(n,k) = n-alternating permutations of length n*k.at n=41A181985
- 4-alternating permutations of length 4n.at n=5A211212
- Unsigned numerators of the nonzero coefficients in the expansion of 1/hypergeom([], [Seq_{k=1..m-1} k/m], (x/m)^m) for m = 4.at n=5A273192
- Triangle read by rows, coefficients of generalized Eulerian polynomials F_{4;n}(x).at n=15A292606