577727domain: NAppears in sequencesSummed lengths of nonintersecting rook paths on a 4 X n board.at n=6A181395Summed lengths of nonintersecting rook paths on an n X k board (square array by antidiagonals).at n=48A181399Summed lengths of nonintersecting rook paths on an n X k board (square array by antidiagonals).at n=51A181399