Some solutions for n=4
..0..1..0..1..2..1....0..1..0..1..0..1....0..1..0..1..0..1....0..1..0..1..0..1
..1..0..3..4..0..2....1..2..1..0..1..0....1..2..1..0..1..3....2..0..1..3..1..0
..0..1..4..2..3..5....0..3..2..3..0..1....0..3..0..1..0..1....0..1..0..1..0..1
..1..6..5..1..0..2....1..2..1..4..5..2....4..5..4..5..6..0....1..0..1..2..1..0
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