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A235839
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Number of (n+1)X(2+1) 0..2 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise
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1
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487, 6921, 86509, 919222, 8638740, 73276865, 573836909, 4209526173, 29315012106, 195567636675, 1260793028680, 7902333022413, 48450753346164, 291857672487975, 1735081638204069, 10213231916866375, 59720608313178454, 347726532976693642
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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..0....2..0..0....2..2..0....2..0..2....1..1..0....0..2..1....1..0..0
..1..1..2....2..1..2....1..0..0....0..2..0....0..1..2....2..2..0....2..1..1
..0..2..2....1..0..2....1..0..0....2..0..1....1..0..0....1..2..2....1..0..2
..1..1..1....0..1..0....0..2..2....1..0..2....0..2..2....0..0..0....2..1..1
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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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