n=4的一些解
..0..1..2....0..1..2....0..1..2....0..0..0....0..0..1....0..1..2....0..0..1
..0..1..1....0..1..1....3..0..1....1..1..1....0..1..2....0..1..2....1..2..3
..2..3..3....2..2..3....3..3..0....2..2..2....1..2..3....3..0..1....3..0..1
..2..3..0....3..3..0....1..2..2....3..3..3....2..3..3....2..3..3....2..2..3
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