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A201138
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Number of nX4 0..5 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other
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1
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15, 135, 117, 7642, 38763, 13009, 593543, 2004404, 480902, 17798640, 46620769, 8409817, 276582081, 623837286, 94647698, 2773619630, 5579098622, 763698176, 20588470139, 37779725883, 4685012892, 119748754402, 206463265860
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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=6
..0..0..1..2....0..0..1..2....0..0..0..2....0..0..1..1....0..0..1..3
..0..1..1..3....0..0..2..2....0..1..1..2....0..0..1..2....0..0..2..3
..0..1..2..5....1..3..3..4....1..2..3..4....1..2..2..5....1..1..2..3
..2..3..3..5....1..3..4..5....1..2..3..4....2..3..3..5....1..2..2..3
..2..3..4..5....1..3..4..5....3..4..4..5....3..3..4..5....4..4..4..5
..4..4..4..5....2..4..5..5....3..5..5..5....4..4..4..5....4..5..5..5
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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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