205628domain: NAppears in sequencesNumber of ways to place 6n nonattacking kings on a 12 X 2n cylindrical chessboard.at n=4A194648Number of ways to place 5n nonattacking kings on a vertical cylinder 10 X 2n.at n=5A195593Row "sums" of triangle A245618, using the operation <+> defined in A245618.at n=23A249768