| DATA
|
6, 36, 161, 581, 1792, 4900, 12174, 27966, 60172, 122464, 237590, 442118, 793092, 1377174, 2322967, 3817351, 6126818, 9624964, 14827487, 22436251, 33394208, 48953224, 70757132, 100942636, 142261016, 198223936, 273277036, 373005396
|
| EXAMPLE
|
Some solutions for n=3
..0..0..0....0..1..0....0..1..0....1..0..0....0..0..0....0..0..0....0..0..0
..1..0..0....0..1..0....1..1..0....1..1..0....0..0..1....0..0..0....0..1..1
..1..0..0....0..1..0....1..1..1....1..1..0....0..1..1....0..1..0....0..1..1
..1..1..0....0..1..1....1..1..1....1..1..1....0..1..1....0..1..1....1..1..1
..1..1..0....0..1..1....1..1..1....1..1..1....0..1..1....1..1..1....1..1..1
|