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