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A258999
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Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally
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1
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512, 6271, 55760, 225215, 219424, 292814, 73734, 112980, 204210, 373950, 691648, 1293909, 2450704, 4696800, 9101720, 17813333, 35142090, 69765156, 139164158, 278562651, 558960096, 1123499142, 2260769566, 4552609547, 9172064656
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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
..0..0..1..1..0....1..1..0..0..1....0..1..0..0..0....0..1..1..0..0
..0..1..0..1..1....0..0..0..0..1....0..0..0..0..1....1..0..0..1..1
..0..1..0..1..0....0..1..1..1..1....1..0..0..0..1....0..1..1..1..1
..1..1..1..1..0....1..1..1..1..1....0..0..1..1..0....1..1..1..1..1
..1..0..1..0..1....0..0..1..1..0....0..1..1..0..1....1..1..1..0..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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