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A183844
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Number of (n+1) X 9 binary arrays with each element of every 2 X 2 subblock being the sum mod 2 of two others.
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1
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16771, 748937, 32887826, 1514840541, 68813532021, 3170254841114, 145160761315615, 6677571801577027, 306435724460478058, 14085188244943032759, 646828687624576311193, 29721310285135340886450
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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 3 X 9
..0..0..1..0..1..1..1..0..1....0..0..0..1..0..0..1..0..1
..1..1..1..0..1..0..1..1..0....0..0..0..1..1..1..1..1..0
..1..0..1..1..1..1..0..0..1....0..0..0..1..0..1..0..0..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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