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A207880
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Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 1 0 vertically
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0
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2, 16, 82, 575, 4387, 33631, 618202, 12501427, 214612008, 11062960730, 657453772615, 25402400315447, 3733312830860298, 643896610977129232, 54640540348513184649, 23181398334398528895458, 11714931649831496203623180
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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
..1..1..0..0....0..0..1..0....1..0..0..1....0..0..1..1....0..0..1..0
..1..1..0..0....0..0..1..0....0..1..0..0....0..1..1..0....1..0..0..1
..1..1..1..0....1..1..1..0....1..0..0..1....0..0..1..0....0..0..1..0
..1..1..0..0....0..0..1..0....0..0..1..0....0..0..1..0....1..0..0..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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