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