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A207308
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Number of 5Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 0 vertically
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1
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10, 100, 350, 1271, 3773, 11497, 36868, 116117, 361408, 1134028, 3564401, 11172725, 35022953, 109875752, 344642683, 1080804698, 3389755038, 10631811817, 33344912997, 104580332523, 328001505224, 1028729270911, 3226449372360
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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: a(n) = a(n-1) +2*a(n-2) +11*a(n-3) +13*a(n-4) +3*a(n-5) -12*a(n-6) -27*a(n-7) -13*a(n-8) -3*a(n-9) +15*a(n-10) +8*a(n-11) +4*a(n-12) -5*a(n-13) -a(n-14) -a(n-15) +2*a(n-16) -a(n-17) for n>18
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EXAMPLE
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Some solutions for n=4
..0..1..0..0....1..0..0..1....1..1..1..1....1..0..0..1....1..0..0..1
..1..1..1..1....1..1..1..0....1..0..0..1....0..0..1..1....1..0..0..1
..0..1..1..1....1..0..0..1....1..1..1..1....0..0..1..1....1..0..0..1
..1..1..1..1....1..1..0..0....1..0..0..1....0..0..1..1....1..0..0..1
..1..1..1..1....1..0..0..1....1..0..0..1....0..0..1..1....1..0..0..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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