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A235403
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Number of (n+1)X(2+1) 0..2 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise
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1
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450, 5916, 87902, 924132, 9730723, 80383489, 662290407, 4576924546, 31580340379, 190518611734, 1148195429676, 6221435108518, 33683343615674, 167262023356753, 829982597507961, 3834137745688182, 17700362554876591, 76951709086870096
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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..1..1....0..1..0....0..0..2....1..0..1....1..2..1....0..2..2....0..0..1
..2..1..2....2..0..2....1..0..2....0..2..0....0..1..0....0..1..0....0..0..0
..2..0..0....2..0..2....0..2..1....0..1..2....2..1..2....1..2..1....1..1..2
..1..2..2....2..2..2....2..0..0....2..1..0....1..0..2....1..0..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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