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