A221726
Number of nX3 arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, with every occupancy equal to zero or two.
Original entry on oeis.org
0, 16, 0, 464, 0, 13948, 0, 420736, 0, 12695288, 0, 383074904, 0, 11559126552, 0, 348791805904, 0, 10524646286488, 0, 317576778411352, 0, 9582745781519416, 0, 289155325092787296, 0, 8725140362031620984, 0, 263277441988312544616, 0
Offset: 1
Some solutions for n=4
..0..0..2....0..2..2....0..2..0....2..2..0....2..2..0....2..0..0....0..2..2
..2..2..0....2..0..0....2..2..2....2..0..0....0..2..2....0..2..2....0..2..0
..0..2..2....0..2..0....0..2..0....0..2..0....0..2..0....2..0..0....2..0..0
..2..0..0....2..0..2....0..0..2....0..2..2....0..0..2....2..2..0....2..2..0
A221727
Number of nX4 arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, with every occupancy equal to zero or two.
Original entry on oeis.org
4, 52, 540, 6188, 71310, 824144, 9525048, 110070012, 1271809066, 14694217628, 169767833676, 1961352594276, 22659537510670, 261784302805272, 3024367348612856, 34940131867655732, 403658398327592910
Offset: 1
Some solutions for n=3
..0..2..2..0....2..0..0..2....0..0..2..2....2..2..0..0....0..2..0..2
..0..0..0..2....2..2..2..2....0..2..2..2....2..2..2..0....0..2..2..0
..2..2..2..0....0..0..0..0....2..0..0..0....0..0..2..0....2..0..0..2
A221729
Number of 3Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, with every occupancy equal to zero or two.
Original entry on oeis.org
0, 16, 0, 540, 0, 22180, 0, 911081, 0, 37357844, 0, 1530451369, 0, 62678117602, 0, 2566608259733, 0, 105095354454990, 0, 4303284726664321, 0, 176203240002820998, 0, 7214839389152381265, 0, 295419432979789366510, 0, 12096265452242634926017
Offset: 1
Some solutions for n=4
..0..2..0..0....2..0..2..0....2..0..2..0....2..2..2..0....2..0..0..2
..0..2..2..0....0..2..2..0....0..2..0..0....0..0..0..2....2..2..2..2
..2..2..0..2....2..0..2..0....0..2..2..2....2..0..0..2....0..0..0..0
A221730
Number of 4 X n arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, with every occupancy equal to zero or two.
Original entry on oeis.org
0, 44, 464, 6188, 80160, 1048566, 13757056, 180437354, 2363318964, 30930073844, 404584067882, 5290050421396
Offset: 1
Some solutions for n=3:
..2..2..0....2..0..2....2..2..0....0..0..2....0..0..2....0..2..0....0..2..0
..0..2..0....2..0..0....0..0..2....2..2..0....2..2..2....2..0..2....0..0..2
..0..0..2....0..2..0....2..2..0....2..2..0....0..2..0....0..2..2....2..2..0
..2..2..0....2..2..0....0..2..0....0..0..2....0..0..2....0..0..2....2..0..2
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