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