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