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A185832
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Half the number of nX6 binary arrays with every element equal to exactly one or two of its horizontal and vertical neighbors
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1
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5, 162, 1430, 11789, 98975, 923808, 7678409, 68363184, 593948668, 5187350050, 45205777641, 395015488029, 3443605978936, 30060887575003, 262260968830996, 2288567378102476, 19968587237909055, 174246131512755338
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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 4X6 with a(1,1)=0
..0..1..1..1..1..1....0..0..1..1..1..0....0..0..0..1..1..0....0..0..0..1..1..1
..0..0..0..0..0..1....0..1..0..0..1..0....0..1..1..1..0..0....0..1..1..0..0..0
..1..1..1..1..1..1....0..1..0..0..1..0....0..1..0..0..1..1....1..0..1..0..1..0
..0..0..0..0..0..0....0..0..1..1..0..0....0..1..1..0..0..1....1..0..1..0..1..0
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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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