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A223816
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Number of 2Xn 0..2 arrays with row sums nondecreasing and column sums unimodal
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1
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6, 50, 337, 1922, 9783, 45537, 198252, 817482, 3229096, 12308970, 45575437, 164673074, 582981253, 2028408899, 6954637113, 23545924195, 78860147938, 261655333573, 861137618468, 2814055941811, 9138890924393, 29517256515379
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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..1....0..2..1....1..1..0....1..2..1....1..1..0....0..0..0....0..1..1
..0..0..1....0..2..2....1..1..0....1..1..2....2..1..0....0..1..0....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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