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A207655
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Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically
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0
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2, 16, 84, 870, 13902, 264568, 12327618, 1144562438, 64916691796, 20511370392174, 15431327748576322, 2046762983891357336, 5203964479172695849850, 32433326970178563780859912
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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..1..0..1....0..1..0..1....0..1..1..0....1..0..1..1....1..0..0..1
..1..1..0..0....0..0..1..0....0..0..1..1....0..0..1..1....0..1..1..0
..1..0..0..1....0..1..0..1....0..1..1..0....1..0..1..0....1..0..1..1
..1..1..0..0....0..1..1..0....0..1..0..1....1..0..0..1....1..1..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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