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A183406
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Number of nX5 binary arrays with each sum of a(1..i,1..j) no greater than i*j/2
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1
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10, 260, 5354, 154079, 3770481, 112353512, 2965955665, 89945894383, 2477411142245, 75930571035939, 2148890776573534, 66330562852888061, 1912878564502004446, 59346407547808417447, 1735296847301030887989
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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 4X5
..0..0..0..1..0....0..1..0..1..0....0..0..1..0..0....0..0..1..1..0
..0..0..0..0..1....0..1..1..0..0....0..1..0..0..0....0..1..0..1..1
..0..0..0..0..0....0..0..0..0..0....1..0..0..1..1....1..0..0..0..1
..0..0..1..1..1....0..1..1..1..0....0..0..1..1..1....1..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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