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