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A208063
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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 0 1 1 vertically
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1
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2, 16, 72, 576, 3696, 26244, 198000, 1638400, 12913840, 117722500, 1052059680, 10059287616, 97769309736, 1020075760144, 10507456855392, 116747852120064, 1295601058976256, 15148523442518244, 177995312325281880
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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....1..0..0..1....1..1..0..1....1..0..0..1....1..1..0..1
..0..0..1..1....1..1..0..1....1..1..0..1....0..1..1..0....0..1..0..1
..0..0..1..1....1..0..0..1....1..1..0..1....1..0..0..1....1..0..0..1
..0..0..1..1....1..0..0..1....1..0..0..1....0..1..1..0....0..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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