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