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