866880

Appears in sequences

• Expansion of e.g.f. sech(sinh(x)*tan(x)) (only even powers).at n=5A012553
• A Jacobsthal number related number triangle.at n=38A110321
• Triangle read by rows: T(n,k) is the sum of the number of the arrangements of p_1 1's, p_2 2's, ..., p_k k's (p_1 + p_2 + ... + p_k = n and p_1 >= p_2 >= ... >= p_k) avoiding equal consecutive terms, where 1 <= k <= n.at n=52A321686
• Number of n-colorings of the vertices of the 6-dimensional cross polytope such that no two adjacent vertices have the same color.at n=8A342074
• Triangle read by rows: T(n,k) is the number of n-colorings of the vertices of the k-dimensional cross polytope such that no two adjacent vertices have the same color. 0 <= k <= n.at n=42A342088
• Triangle read by rows: Column k has e.g.f. t^k / ((1 - t)^(k + 1) * exp(t)).at n=42A372723