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