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A236424
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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 columnwise and nonincreasing rowwise
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1
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487, 5772, 60193, 544380, 4505522, 34394854, 247470127, 1692391516, 11125768607, 70778574186, 438808934095, 2664649821781, 15926647839729, 94055397322922, 550759978627494, 3206878777142928, 18613731789595410, 107906959499841906
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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..1....1..2..2....1..1..0....1..2..0....2..0..0....1..0..1....0..2..0
..2..1..2....2..2..2....1..2..0....1..1..0....1..0..2....2..2..1....0..1..0
..0..1..0....0..1..0....0..2..0....1..0..2....2..0..0....1..0..2....2..0..2
..0..1..2....1..1..1....1..2..1....1..1..1....0..1..1....2..2..1....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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