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A185930
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Number of (n+1)X7 0..3 arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace
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1
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106519232, 304295071104, 901434253841216, 2660771010874885728, 7860583219546798541024, 23221991267256751327588320, 68603053673782945157839799264, 202669623828919364821359439182528
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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 3X7
..2..0..2..0..0..2..0....2..0..2..2..1..3..0....2..0..2..3..0..1..0
..0..0..0..0..3..0..1....0..0..0..0..2..1..2....0..0..0..0..3..1..1
..0..0..2..0..1..2..0....0..0..2..0..3..3..1....0..0..2..0..2..1..2
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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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