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A257419
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Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally
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0
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512, 7652, 117324, 1770206, 12316842, 115919394, 1037269100, 6191314193, 57799643410, 478127487069, 2903676329504, 27615631745955, 219195987569254, 1325497215293808
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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..0..1..0....0..0..1..1..1....0..0..0..0..0....1..0..0..1..1
..0..0..0..1..1....0..0..0..0..0....1..0..0..0..1....0..0..1..0..1
..0..1..1..1..0....1..1..0..1..0....0..0..1..1..1....0..0..0..0..1
..0..0..0..0..0....0..1..0..1..1....1..1..1..1..0....0..1..1..1..1
..0..1..1..0..1....0..0..0..1..1....0..1..1..1..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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