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