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