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