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A184206
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Number of (n+1)X9 binary arrays with no 2X2 subblock containing fewer than two 1s
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1
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31707, 4556371, 518574936, 64377477751, 7795714368919, 952294826074262, 116023864377980183, 14148460147460008963, 1724850427268614620086, 210297145807804211632731, 25639101187522824504622401
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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 3X9
..0..0..0..0..1..0..0..1..1....0..0..0..1..0..0..1..0..1
..1..1..1..1..1..1..1..0..0....1..1..1..0..1..1..1..1..0
..1..0..0..0..0..1..1..1..1....0..0..1..1..0..1..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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