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A207087
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Number of nX7 0..1 arrays avoiding 0 0 0 horizontally and 0 0 1 vertically
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1
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81, 6561, 248525, 8244759, 243794389, 6897033117, 189659424011, 5142718466575, 138294979168509, 3702335938084439, 98860585328779343, 2635998227067669263, 70227731343750962247, 1870120121498081593459, 49786813201495602614131
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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..0..1..0..1....1..1..0..0..1..1..1....0..0..1..0..1..1..1
..0..0..1..0..0..1..0....1..1..1..1..1..0..1....1..1..1..1..0..0..1
..0..0..1..0..1..0..1....0..0..1..1..0..1..1....0..1..1..0..1..0..0
..0..0..1..0..0..1..0....0..0..1..0..0..1..1....1..0..1..1..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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