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