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A266425
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Number of nX5 binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing.
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1
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6, 41, 259, 1556, 8764, 45907, 223075, 1005991, 4224203, 16588684, 61226525, 213418690, 705807396, 2223963956, 6702140026, 19383434369, 53965133477, 145029252226, 377163396856, 951257706522, 2331468492530, 5562985385965
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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
..0..0..0..1..1....0..0..1..1..1....0..0..1..1..1....0..0..0..1..1
..0..1..1..1..1....0..1..0..0..1....0..0..1..1..1....0..0..1..0..1
..1..0..1..0..0....1..0..0..0..0....0..1..0..0..1....0..0..1..1..1
..1..1..0..0..0....1..1..1..1..1....1..0..0..0..1....0..1..0..1..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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