1535440domain: NAppears in sequencesNumber of ways to place 5 nonattacking queens on an n X n board.at n=5A108792Number T(n,k) of ways to place k nonattacking queens on an n X n board; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=60A348129Number of ways to place n nonattacking queens on a 2n X 2n board.at n=5A348130