2983458766

Appears in sequences

• Number of directed 4-regular graphs on n nodes.at n=5A219891
• Number of directed 5-regular graphs on n nodes.at n=4A219892
• Triangle read by rows: T(n,k) is the number of k-regular digraphs on n unlabeled nodes, k = 0..n-1.at n=49A350910
• Triangle read by rows: T(n,k) is the number of k-regular digraphs on n unlabeled nodes, k = 0..n-1.at n=50A350910