Some solutions with all values 0 to 6 for n=5
..0..1..0..1....0..1..0..1....0..1..0..1....0..1..0..1....0..1..0..1
..1..0..1..0....1..0..1..0....1..0..1..0....1..0..1..0....1..0..1..0
..0..2..0..1....2..1..0..1....2..3..0..1....2..3..0..1....2..3..0..1
..3..4..1..4....1..0..3..4....4..5..6..3....4..5..4..5....1..0..4..2
..5..6..4..0....5..4..0..6....6..0..4..0....0..4..6..1....4..5..3..6
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