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A253319
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Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw
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0
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16, 126, 1217, 7744, 58505, 283804, 1660088, 6753250, 32941939, 123940122, 544975707, 2033911736, 8556436417, 32990467558, 137911795230
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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=4
..0..0..0..0..1....0..1..0..0..0....0..0..0..0..0....0..0..0..0..0
..1..0..1..0..0....0..0..0..1..1....0..0..0..0..0....0..0..0..1..0
..0..0..0..0..1....0..1..0..1..0....1..0..1..0..1....1..0..1..0..1
..0..1..0..1..1....1..0..1..1..1....1..0..1..0..1....0..1..0..1..1
..0..1..1..1..1....0..1..1..0..1....0..1..1..1..1....1..0..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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