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