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