n=4的一些解
..0..0..0....0..0..2....2..0..2....0..0..0....1..0..0....0..0..0....0..0..0
..2..2..2....2..2..0....0..0..0....0..2..2....3..1..1....0..0..0....0..1..0
..0..0..0....0..2..0....0..0..0....2..2..0....1..1..3....0..1..0....1..3..1
..0..0..0....0..2..0....2..0..2....0..0..0....0..0..1....1..3..1....0..2..0