| DATA
|
13, 57, 236, 959, 3872, 15586, 62632, 251419, 1008536, 4043582, 16206152, 64933782, 260114976, 1041797124, 4171943056, 16704821779, 66880877896, 267747443494, 1071808583176, 4290243456514, 17172082337536, 68729504287324
|
| EXAMPLE
|
Some solutions for n=3
..1....0....0....1....0....0....1....1....1....0....1....0....1....0....0....0
..0....0....0....1....0....0....0....0....0....0....1....0....0....0....1....1
..1....1....0....1....1....0....1....0....1....1....1....0....0....1....0....0
..1....0....0....0....0....0....0....1....0....0....0....0....0....0....1....1
..0....1....0....0....1....0....0....0....0....1....0....0....1....0....1....0
..0....0....1....0....0....1....1....0....1....1....0....0....0....0....0....1
..0....0....1....0....1....0....1....0....0....0....1....0....0....0....0....0
..1....0....1....1....0....1....0....1....0....0....0....1....1....0....1....0
..1....1....0....1....0....1....1....1....1....1....1....0....0....0....0....0
|