1384880065domain: NAppears in sequencesArray read by antidiagonals: T(n,m) is the number of matchings in the rook graph K_n X K_m.at n=39A270227Array read by antidiagonals: T(n,m) is the number of matchings in the rook graph K_n X K_m.at n=41A270227Number of matchings in the 4 X n rook graph.at n=6A341503