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