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A222505
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Number of nX4 0..1 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order
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1
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3, 3, 15, 84, 497, 2862, 15420, 86570, 484976, 2751326, 15597305, 89022483, 508390703, 2915183250, 16739260404, 96360825455, 555513635334, 3208071753051, 18550893260858, 107413402302763, 622649366897782, 3613180083184007
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=3
..0..0..1..1....0..0..1..1....0..0..0..0....0..0..0..0....0..0..0..0
..1..1..1..1....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..1..1..1..1....0..0..0..0....1..1..0..0....0..1..0..1....0..0..1..1
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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