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