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A187724
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Number of (n+1)X5 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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391, 2804, 20684, 161571, 1252304, 9823368, 76931991, 603313744, 4730797071, 37100667206, 290947460647, 2281693532812, 17893663414565, 140326848073352, 1100482594455998, 8630285459242719, 67681077927288230, 530773701234315911
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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 3X5
..0..0..1..1..0....1..1..0..0..1....0..1..0..1..1....0..0..1..0..1
..0..1..0..1..1....1..1..0..1..1....0..1..1..0..0....0..1..1..1..1
..1..1..1..1..0....1..0..0..1..1....1..0..1..1..1....1..1..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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