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