| 数据
|
18, 324, 1014, 3513, 14184, 45520, 135686, 417772, 1253238, 3651096, 10647801, 30923564, 88853464, 254267485, 725590642, 2060214105, 5827339605, 16437397037, 46220378910, 129590864085, 362487844504, 1011664530775, 2817477642474
|
| 例子
|
n=4的一些解
..0..0..1..0..0..1....1..1..1..1..0..1....0..0..1..0..1..0....0..1..0..1..0..1
..1..1..1..1..1..1....0..0..1..0..0..1....1..1..1..0..1..0....1..0..0..1..0..1
..0..0..1..0..0..1....0..0..1..0..1..0....0..0..1..0..1..0....0..0..1..0..0..1
..0..0..1..0..0..1....0..1..0..1..0..0....0..0..1..0..1..0....0..1..0..0..1..0
|