38298270domain: NAppears in sequencesArray read by antidiagonals: T(m,n) is the number of (undirected) paths in the rook graph K_m X K_n.at n=23A360877Array read by antidiagonals: T(m,n) is the number of (undirected) paths in the rook graph K_m X K_n.at n=25A360877