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