n=5的一些解
..0..0..0..0....0..3..0..0....0..0..3..0....0..0..3..0....0..0..0..0
..0..0..1..0....0..0..0..0....0..1..0..0....1..3..0..3....3..0..0..3
..3..0..3..0....0..0..0..0....0..3..0..0....0..0..0..0....0..3..1..0
..0..3..0..3....0..0..0..0....3..0..0..0....3..0..0..3....0..0..0..0
..0..1..0..0....0..0..0..0....0..0..3..0....0..0..3..0....0..0..3..0