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