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A235840
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Number of (n+1)X(3+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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2581, 86509, 2919508, 84434218, 2090202044, 44724089619, 849474770590, 14522792725086, 227945075932922, 3310579596663058, 45097735688257706, 578891366979555783, 7068001519607692033, 82341095995180796862
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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=2
..0..2..2..2....2..0..2..1....0..2..2..0....0..2..2..0....1..0..1..0
..2..2..0..0....0..1..0..0....1..2..2..0....2..1..2..0....0..1..0..1
..0..1..1..0....0..0..0..2....0..0..1..2....1..0..1..1....0..1..2..0
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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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