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A207105
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Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically
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0
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2, 16, 98, 643, 4047, 22714, 139341, 794118, 4654884, 27655332, 162017453, 985389943, 5963777274, 36963453329, 232521285314, 1479703961900, 9627524117464
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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..1..1....0..0..1..0....1..0..0..1....1..1..0..1....1..1..1..0
..1..1..0..0....1..0..1..0....0..1..0..0....0..0..1..0....0..1..0..0
..1..1..1..1....0..0..1..0....1..1..0..1....0..1..0..1....0..1..0..0
..1..1..0..0....0..0..1..0....0..1..0..0....0..0..1..0....0..1..0..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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