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A207387
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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 1 0 vertically
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0
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2, 16, 98, 643, 5348, 42167, 335915, 2975974, 27237128, 254712604, 2518233755, 25906520150, 274611244775, 3028044205471, 34585700854386
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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..0..1..1....0..1..1..1....1..0..1..1....1..0..0..0....0..1..1..0
..0..1..1..0....0..0..0..0....1..0..1..1....0..1..1..0....0..0..0..0
..1..1..1..1....0..1..1..0....1..0..1..1....1..0..0..0....0..1..1..0
..0..1..1..1....0..0..0..0....1..0..1..1....1..1..1..0....0..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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