| 数据
|
4, 18, 78, 336, 1446, 6222, 26772, 115194, 495654, 2132688, 9176478, 39484326, 169892196, 731008002, 3145363422, 13533793104, 58232875254, 250562996958, 1078116359028, 4638892804266, 19960114944246, 85883896308432
|
| 例子
|
n=4的一些解
..0..1..0....0..0..0....0..1..1....0..1..1....0..1..1....0..1..0....0..0..0
..1..0..1....1..0..1....1..0..1....1..0..0....0..1..0....1..0..1....0..1..1
..0..1..0....0..1..0....1..1..0....1..1..1....0..1..1....1..0..1....1..0..1
..1..0..1....0..0..1....1..0..1....1..0..1....0..1..0....1..1..0....0..1..0
|