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A251220
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Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having the minimum of its diagonal elements greater than the absolute difference of its antidiagonal elements
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1
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14, 305, 20782, 4462968, 3007738372, 6373427948731, 42432102644410392, 887822645668106069016, 58374742677350528694024651, 12061621459257582136492647314788, 7831831916823870434473136772446378463
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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..0..0..1....1..0..1..0....1..1..0..0....0..1..1..0....1..1..1..0
..1..0..0..1....0..0..1..1....0..1..0..1....1..0..1..0....1..0..1..1
..0..0..0..1....0..0..0..0....0..1..1..1....1..1..1..1....0..0..0..1
..0..0..0..0....1..1..0..1....0..0..0..1....0..0..1..0....1..0..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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