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A204353
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Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly one way, and new values 0..1 introduced in row major order
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0
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74, 713, 5516, 29977, 174154, 1006754, 5145580, 25995176, 133684004, 707201520, 3661939020, 18948360322, 97881117718, 510078073616, 2645150326944, 13723850334058, 71090541203488, 369204600318682, 1915031044755598
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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..0..1..1....0..0..1..1..0....0..0..1..0..0
..1..1..0..0..1....0..1..1..0..0....0..0..1..1..0....1..1..0..0..1
..1..0..1..0..0....1..1..0..1..0....1..1..0..0..1....1..0..0..1..1
..1..0..0..1..0....1..0..0..1..1....1..1..0..0..1....1..0..1..1..0
..1..1..0..0..1....0..0..1..1..0....0..0..1..1..0....0..1..0..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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