n=3的一些解
..0..3..2....2..3..0....1..1..3....2..3..2....2..1..1....0..1..2....3..3..0
..2..1..0....3..3..1....2..0..2....1..1..1....0..2..3....2..3..0....0..1..3
..3..2..3....2..3..0....3..3..1....2..3..2....2..1..3....0..1..0....1..1..2
..0..3..0....3..3..1....0..2..2....2..2..2....2..2..3....0..3..0....2..1..1