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A200987
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Number of nX5 0..4 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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2
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1, 21, 140, 1095, 4919, 27000, 97341, 383172, 1188521, 3704820, 9947816, 27240277, 65292069, 157646021, 349738426, 770969390, 1585648871, 3256248216, 6303135880, 12177430692, 22459794938, 41128002746, 72582886199, 127586136583
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OFFSET
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1,2
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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..2..4....0..0..1..1..1....0..0..1..1..1....0..0..1..1..4
..1..1..1..3..4....0..2..2..2..4....0..2..2..2..3....0..2..2..2..4
..2..2..3..3..4....3..3..3..4..4....3..3..4..4..4....1..3..3..3..4
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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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