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