196846257domain: NAppears in sequencesArray read by antidiagonals: T(n,m) is the number of (undirected) cycles in the rook graph K_n X K_m.at n=30A286418Array read by antidiagonals: T(n,m) is the number of (undirected) cycles in the rook graph K_n X K_m.at n=33A286418Number of cycles in the 3 X n rook graph.at n=5A341501