437500380domain: NAppears in sequencesNumber of ways to place n^2 nonattacking kings on a 2n X 2n cylindrical chessboard.at n=8A137432Number of ways to place 8n nonattacking kings on a 16 X 2n cylindrical chessboard.at n=7A195652Number of ways to place 8n nonattacking kings on a vertical cylinder 16 X 2n.at n=7A195657