Some solutions for n=4
.....0........0........3........0........3........2........0........1
....1.0......1.1......0.1......1.0......0.0......0.2......0.1......0.1
...1.0.3....1.0.0....0.1.0....0.3.1....1.1.4....0.1.0....0.2.3....1.0.0
..0.2.3.0..1.2.3.1..0.1.4.0..0.2.3.0..1.0.0.0..0.2.1.2..2.0.2.0..2.2.3.0
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