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A232873
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Number of (n+1)X(3+1) 0..1 arrays x(i,j) with row sums sum{j^2*x(i,j), j=1..3+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing
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1
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25, 130, 650, 2715, 8988, 26553, 74515, 202293, 523052, 1268666, 2897425, 6311293, 13270455, 26979740, 53109749, 101190045, 187316955, 338279583, 597743822, 1035188036, 1758172498, 2931994598, 4807675414, 7759356347, 12338518046
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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=5
..0..0..0..0....1..0..0..0....0..0..0..0....1..0..0..0....1..0..0..1
..0..1..0..0....0..1..0..0....1..0..0..1....0..0..0..1....1..0..0..1
..1..0..1..0....0..1..0..0....1..0..1..1....1..1..0..1....0..0..1..1
..1..0..0..1....1..0..0..1....0..1..1..1....1..1..0..1....0..0..1..1
..0..1..1..1....1..0..1..1....0..1..1..1....0..0..1..1....1..0..1..1
..0..1..1..1....0..1..1..1....0..1..1..1....0..1..1..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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