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