n=5的一些解
..0..0..2..2....1..0..0..0....0..0..1..1....1..1..0..0....0..0..1..0
..1..1..2..2....1..0..2..2....0..0..2..2....0..0..1..0....0..0..1..0
..0..0..0..0....0..0..2..2....1..0..2..2....0..0..1..0....1..0..0..1
..1..1..0..0....1..1..0..0....1..0..1..0....1..2..2..1....1..2..2..1
..0..0..1..1....0..0..1..1....0..0..1..0....1..2..2..1....0..2..2..0