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A187728
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Number of (n+1)X9 binary arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors
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1
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31672, 758077, 20085335, 603313744, 17862966996, 539993233442, 16272953514081, 491415809239410, 14834567892263310, 447914817916999238, 13523383455137330541, 408310937632489730609, 12328003510777120406346
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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 3X9
..0..1..1..0..0..0..0..0..1....1..1..0..0..1..1..0..1..0
..0..1..1..0..1..0..1..1..1....0..1..0..1..1..1..1..1..0
..0..0..0..0..0..0..0..0..1....0..1..1..0..1..0..1..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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