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A186936
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Number of (n+1)X7 binary arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces
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1
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1000, 27272, 241320, 2504264, 25314744, 264604776, 2731872328, 28477050608, 295182600552, 3063267862112, 31785328427832, 329995464895168, 3425533459997032, 35554512231460224, 369074247549339088
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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 4X7
..0..0..0..0..1..1..1....0..1..0..0..1..0..0....0..0..0..0..0..1..0
..0..0..0..0..0..0..0....0..0..0..1..1..0..0....0..0..0..0..1..1..0
..0..0..1..1..1..0..0....1..0..0..0..1..1..0....1..1..1..1..1..1..0
..1..1..1..1..1..0..1....0..0..1..1..1..1..1....0..0..1..1..1..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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