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A201212
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Number of nX4 0..3 arrays with every row and column running average nondecreasing rightwards and downwards
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1
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51, 867, 11932, 146946, 1692945, 18624423, 198262359, 2055746385, 20869314255, 208139081237, 2045065967111, 19837690800848, 190312987378848, 1808321481842796, 17039496826295448, 159395007901738133
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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=3
..0..0..0..0....0..0..0..3....0..0..3..2....0..0..2..2....0..0..0..0
..0..3..2..2....0..0..3..3....1..2..3..2....0..2..3..2....0..3..3..2
..2..2..3..3....1..3..3..3....1..1..3..2....2..3..3..3....1..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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