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A208159
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Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 0 1 0 vertically
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1
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2, 16, 102, 981, 14446, 297702, 9072707, 424153857, 29316311612, 3025550427476, 473181884230845, 111694857841157921, 39694965205591894619, 21331992417577197285058, 17352141355803100139646251
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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..0....1..1..1..0....0..1..1..0....0..1..0..0....0..0..1..0
..0..1..0..0....1..1..0..0....0..0..1..1....0..1..1..0....1..0..0..1
..0..1..0..0....0..0..1..0....0..1..1..1....0..0..1..0....1..0..0..1
..0..1..0..0....0..1..1..0....0..1..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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