Some solutions for n=4
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..2..2..3..2..2..3....3..2..2..3..2..2....2..3..2..2..0..2....2..2..3..2..2..3
..1..3..3..1..3..3....3..1..3..3..1..3....2..2..3..2..2..3....1..3..3..1..3..3
..2..3..2..2..0..2....2..2..3..2..2..3....1..0..3..1..3..3....2..3..2..2..3..2
..2..2..3..2..2..3....0..2..2..0..2..2....2..3..2..2..0..2....2..2..3..2..2..0
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