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A252394
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Number of (n+2)X(3+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4
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1
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224346, 9807871, 454970982, 19516646285, 851022689884, 37408598546844, 1637298217327736, 71675190624017977, 3139889940063837080, 137516081439046961836, 6022451091771727200405, 263767184952534766097247
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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=1
..0..0..1..0..0....0..1..1..1..0....0..0..0..0..1....0..0..1..0..1
..1..0..0..0..0....1..1..1..1..0....0..0..1..0..0....0..0..1..0..1
..0..1..0..0..2....0..0..0..0..1....1..0..1..1..1....0..1..0..2..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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