A267725
Number of 2Xn arrays containing n copies of 0..2-1 with every element equal to at least one horizontal neighbor and the top left element equal to 0.
Original entry on oeis.org
0, 1, 1, 3, 5, 12, 26, 60, 143, 353, 879, 2200, 5528, 13963, 35421, 90122, 229729, 586438, 1498966, 3836099, 9827905, 25202549, 64683193, 166137751, 427022480, 1098291533, 2826500851, 7278246356, 18751418071, 48334451894, 124647030884
Offset: 1
Some solutions for n=6
..0..0..1..1..0..0....0..0..1..1..1..1....0..0..1..1..0..0....0..0..0..0..0..0
..0..0..1..1..1..1....0..0..0..0..1..1....1..1..1..1..0..0....1..1..1..1..1..1
A267726
Number of 3Xn arrays containing n copies of 0..3-1 with every element equal to at least one horizontal neighbor and the top left element equal to 0.
Original entry on oeis.org
0, 2, 2, 30, 58, 588, 2388, 17456, 102874, 731154, 5027962, 36610288, 266876496, 1982397806, 14796809106, 111298650288, 840466993090, 6372988144620, 48466708273020, 369602842446350, 2824995007935614, 21637397279211678
Offset: 1
Some solutions for n=4
..0..0..0..0....0..0..2..2....0..0..1..1....0..0..0..0....0..0..2..2
..2..2..1..1....1..1..0..0....1..1..2..2....2..2..1..1....1..1..1..1
..1..1..2..2....1..1..2..2....2..2..0..0....2..2..1..1....0..0..2..2
A267722
Number of nX5 arrays of permutations of 5 copies of 0..n-1 with every element equal to at least one horizontal neighbor and the top left element equal to 0.
Original entry on oeis.org
1, 5, 58, 1398, 55896, 3353880, 281725200, 31553227440, 4543664711040, 817859648350080
Offset: 1
Some solutions for n=4
..0..0..3..3..3....0..0..1..1..1....0..0..1..1..1....0..0..0..3..3
..0..0..0..2..2....3..3..3..2..2....2..2..2..2..2....0..0..1..1..1
..1..1..1..1..1....3..3..2..2..2....3..3..0..0..0....2..2..3..3..3
..2..2..2..3..3....1..1..0..0..0....3..3..3..1..1....1..1..2..2..2
A267723
Number of nX6 arrays of permutations of 6 copies of 0..n-1 with every element equal to at least one horizontal neighbor and the top left element equal to 0.
Original entry on oeis.org
1, 12, 588, 93672, 33807456, 22933860480, 26118842636160, 46232213032938240
Offset: 1
Some solutions for n=4
..0..0..0..0..2..2....0..0..3..3..0..0....0..0..1..1..0..0....0..0..2..2..2..2
..3..3..1..1..1..1....1..1..3..3..2..2....2..2..2..2..3..3....3..3..1..1..1..1
..2..2..0..0..3..3....2..2..2..2..3..3....3..3..1..1..1..1....0..0..1..1..0..0
..2..2..3..3..1..1....1..1..1..1..0..0....0..0..3..3..2..2....3..3..3..3..2..2
A267727
Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to at least one horizontal neighbor and the top left element equal to 0.
Original entry on oeis.org
0, 6, 6, 630, 1398, 93672, 609264, 20702760, 279681294, 7420195854, 149049265998, 3763960753368, 88917911372016
Offset: 1
Some solutions for n=4
..0..0..0..0....0..0..3..3....0..0..1..1....0..0..2..2....0..0..2..2
..2..2..3..3....1..1..3..3....0..0..3..3....1..1..3..3....3..3..3..3
..2..2..1..1....2..2..0..0....2..2..3..3....0..0..3..3....2..2..0..0
..1..1..3..3....1..1..2..2....2..2..1..1....1..1..2..2....1..1..1..1
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