Some solutions for n=3 k=2
..0..0..0..1....0..1..0..1....0..1..0..1....0..1..0..1....0..1..0..0
..1..0..2..1....0..1..0..1....0..1..0..1....0..1..0..1....0..1..2..1
..1..1..2..3....2..3..2..0....2..2..1..0....2..2..3..3....3..3..2..1
..1..0..0..3....2..3..2..0....3..3..1..0....4..4..0..0....0..4..4..4
..3..1..2..2....0..0..3..3....4..4..2..2....1..1..2..1....0..0..4..3
..3..1..4..4....4..4..1..1....1..1..4..4....4..4..2..1....0..1..1..3
|