433500domain: NAppears in sequencesNumber of ways to place n nonattacking composite pieces queen + rider[3,4] on an n X n chessboard.at n=16A189879Number of ways to place 2n nonattacking kings on a 4 X 2n cylindrical chessboard.at n=10A194644Number of ways to place 11n nonattacking kings on a vertical cylinder 22 X 2n.at n=1A195660