1118398domain: NAppears in sequencesNumber of ways to place n^2 nonattacking kings on a 2n X 2n cylindrical chessboard.at n=6A137432Number of ways to place 6n nonattacking kings on a 12 X 2n cylindrical chessboard.at n=5A194648Number of ways to place 6n nonattacking kings on a vertical cylinder 12 X 2n.at n=5A195594