Some solutions for n=5
...0...............0...............0...............0...............0
...2..1...........-2.-1............1..0............0..1............0..1
...0..2..2.........0..0.-1.........0..2..2........-1..1..3.........1..0..0
...2..1..2..1......2..1..1..1......1..1..1..0......1..1..2..1.....-1.-1..1..2
...2..0..1..2..0...1..0..1..3..1...3..3..1..0..1...2..0..2..0..2..-2..0..0..2..2
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