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