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