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A251257
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Number of (n+1)X(7+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge
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1
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850, 10108, 69270, 836546, 6080510, 71459218, 539961360, 6151714502, 47962536500, 531311887046, 4253113770276, 45982917729368, 376446763366200, 3985975267619006, 33263747474025152, 345977830407359282
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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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FORMULA
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Empirical recurrence of order 49 (see link above)
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EXAMPLE
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Some solutions for n=3
..0..0..0..0..0..0..0..1....1..0..1..1..0..1..0..1....1..0..0..0..1..0..1..0
..1..1..1..1..0..1..0..0....0..0..0..0..0..0..0..1....0..0..1..0..0..0..0..0
..0..0..0..0..0..1..0..1....0..1..1..0..1..1..0..1....1..0..0..0..1..0..1..0
..1..0..1..1..0..0..0..1....0..0..0..0..0..0..0..1....0..0..1..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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