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A207062
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Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically
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1
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2, 16, 102, 720, 6398, 54684, 468348, 4356936, 41716708, 403445900, 4037337213, 41571957024, 435311467198, 4653843868560, 50835606848268, 564791240516000, 6378296516533122, 73247208566761530, 853936849893078000
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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 n=4
..0..0..0..0....1..0..0..0....1..1..0..1....1..1..0..0....0..1..1..0
..1..1..0..1....1..1..0..0....0..0..0..0....1..0..0..0....0..1..1..1
..1..0..0..0....1..0..0..0....0..0..0..0....0..0..0..0....0..1..1..1
..0..0..0..0....1..0..0..0....0..0..0..0....0..0..0..0....0..0..0..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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