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