n=3的一些解
..0..1..2..1..2..0..0....0..0..0..0..1..0..2....0..0..1..0..0..1..0
..1..2..1..1..0..1..0....1..1..0..2..1..0..1....2..0..1..2..2..0..1
..1..0..0..2..2..2..2....0..2..0..1..2..1..0....0..2..1..2..1..0..1
..2..1..0..2..0..1..2....2..0..2..1..0..1..2....1..2..0..2..1..0..2
..2..1..0..1..2..1..2....1..2..2..1..0..2..0....2..0..2..0..1..1..0
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