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A235552
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Number of (n+1)X(4+1) 0..1 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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288, 2878, 33851, 378570, 3824372, 33823017, 265989722, 1875119528, 12064334056, 71470709789, 394816481079, 2046492520798, 10040116514715, 46818554972015, 208795743874615, 893130423787384, 3681115372968065, 14648853777588355
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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
..1..1..0..0..1....0..1..1..0..0....0..1..1..0..1....1..0..1..0..0
..1..0..1..0..0....1..1..0..1..0....0..1..1..0..0....1..1..0..0..1
..0..1..1..1..0....1..1..0..0..0....1..0..0..1..0....1..0..0..0..0
..1..0..0..1..1....0..0..0..0..0....1..0..0..0..0....0..1..1..1..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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