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A184188
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Half the number of (n+1)X(n+1) binary arrays with no 2X2 subblock containing exactly one 1
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1
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6, 104, 5074, 723635, 294738261, 345350598641, 1159953545419800, 11179084602659460821, 309007688117388883362756, 24500703075201459753727015848, 5572033834554753242178727061445289
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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 3X3
..1..0..1....1..0..1....1..0..1....0..1..0....0..1..0....1..0..0....1..0..0
..1..1..1....0..1..1....1..1..1....1..1..1....1..0..1....0..1..1....0..1..1
..1..1..1....1..0..0....0..0..0....0..1..1....1..1..1....0..1..0....1..1..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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