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A233304
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Number of (4+1) X (n+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..4+1} nondecreasing.
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1
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64, 502, 3556, 21957, 122022, 616439, 2871477, 12451710, 50714574, 195371008, 716295219, 2512238327, 8466906587, 27527291020, 86628418167, 264674530948, 787179022872, 2284373978387, 6482027000245, 18018759544172, 49152990387893
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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..1..0..0....0..0..0..0..1....0..1..0..0..1....0..0..0..0..0
..0..0..0..1..1....0..0..0..1..1....1..0..0..0..1....0..0..0..0..1
..1..0..0..0..1....1..0..0..1..0....0..0..0..1..1....0..0..0..1..1
..0..1..1..1..1....1..0..0..0..1....0..1..0..0..1....0..1..1..1..1
..1..1..1..1..1....0..1..1..1..1....0..0..1..1..1....0..1..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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