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A200530
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Number of nX4 0..2 arrays with every row and column running average nondecreasing rightwards and downwards
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1
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19, 146, 905, 4848, 23925, 111085, 494555, 2132979, 8981773, 37125420, 151253915, 609247412, 2432002859, 9638730963, 37983584772, 149003379789, 582403346152, 2269881052166, 8826625108206, 34261690527204, 132805131519232
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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..1....0..0..0..2....0..0..0..0....0..0..0..1....0..1..1..1
..1..1..2..2....0..0..0..2....0..0..0..2....0..0..0..2....1..2..2..2
..2..2..2..2....0..0..1..2....0..1..1..2....1..1..2..2....1..2..2..2
..2..2..2..2....1..2..2..2....0..2..1..2....1..2..2..2....1..2..2..2
..2..2..2..2....1..1..1..2....0..2..1..2....2..2..2..2....2..2..2..2
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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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