| DATA
|
474, 4176, 37018, 334180, 2988228, 26755684, 239823278, 2152052046, 19284072120, 172791130750, 1548885972816, 13886350823992, 124465875300538, 1115550628999210, 9999316448921006, 89632910699558058, 803421988230512594
|
| EXAMPLE
|
Some solutions for n=3
..0..0..2....1..0..1....2..2..0....1..2..0....0..2..2....2..0..0....1..2..2
..1..1..0....1..0..0....1..1..1....2..1..2....0..1..2....2..1..1....1..1..1
..1..1..1....2..1..1....1..2..2....1..1..2....1..0..0....0..1..2....0..0..2
..2..2..1....0..2..2....1..0..0....1..0..1....2..0..2....2..2..1....0..0..0
|