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