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A184194
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Half the number of (n+1)X7 binary arrays with no 2X2 subblock containing exactly one 1
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1
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1908, 90185, 3901193, 174401423, 7751834608, 345350598641, 15380031974284, 685056630399242, 30513075478492147, 1359098254767356165, 60536202458667509811, 2696372582587335783277, 120100441888134027505701
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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 3X7
..0..1..0..1..0..0..1....0..1..1..1..0..1..1....0..1..0..0..0..1..1
..1..1..0..1..1..1..0....1..1..0..1..1..1..0....1..0..1..1..1..1..1
..0..1..1..0..1..1..1....1..0..1..1..0..1..1....1..1..0..0..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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