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A254914
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Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and central column plus the two minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically
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1
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512, 19890, 1041262, 28576911, 549282376, 7539746842, 82012007541, 1556819513546, 17747014175801, 264891745874783, 7544378754973669, 128524099836716025, 1084428849732639859, 284665689827815340390
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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..0..1..1....1..0..1..0....1..1..0..0....0..0..1..0....0..0..0..0
..0..1..1..1....0..0..0..0....0..0..0..1....0..1..0..0....0..0..0..0
..1..1..1..1....1..0..1..0....0..0..1..1....0..0..1..1....0..0..0..1
..1..1..1..1....0..1..1..1....1..0..0..1....1..0..0..1....0..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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