317680

Appears in sequences

• Number of nonseparable rooted toroidal maps with n + 4 edges and n + 1 vertices.at n=6A006409
• Number of n X 5 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=18A207450
• Triangle read by rows: T(n,k) is the number of nonseparable rooted toroidal maps with n edges and k faces, n >= 2, k = 1..n-1.at n=38A342989
• Triangle read by rows: T(n,k) is the number of nonseparable rooted toroidal maps with n edges and k faces, n >= 2, k = 1..n-1.at n=42A342989