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A202555
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Number of nX3 0,1 arrays with the row and column sums nondecreasing
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1
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4, 17, 66, 235, 824, 2848, 9520, 31648, 104536, 339553, 1099666, 3549038, 11338836, 36160324, 115069316, 363700188, 1148126044, 3619072821, 11352513438, 35579368776, 111388887136, 347450537496, 1083054672896, 3373317547471
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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=8
..0..1..0....0..1..0....1..0..0....0..0..0....0..0..0....0..1..1....1..0..0
..0..0..1....0..1..0....0..0..1....0..0..1....0..0..1....1..0..1....1..1..0
..0..0..1....0..0..1....0..0..1....0..0..1....0..0..1....1..1..0....1..0..1
..0..1..0....0..0..1....0..0..1....1..0..0....0..1..0....1..0..1....1..1..0
..0..1..0....1..0..1....0..1..1....0..1..0....0..1..0....0..1..1....0..1..1
..0..0..1....1..0..1....1..1..0....0..1..1....1..0..0....0..1..1....0..1..1
..1..0..0....0..1..1....1..0..1....0..1..1....0..0..1....0..1..1....1..0..1
..0..1..1....1..1..0....0..1..1....1..1..1....0..1..1....1..0..1....0..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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