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A207594
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Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 1 1 vertically
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1
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25, 625, 1250, 5000, 18150, 70800, 263550, 1018700, 3824100, 14714500, 55475900, 212837550, 804627850, 3080577400, 11668031250, 44603903700, 169169362450, 645969220100, 2452350886150, 9356569191650, 35546345269650, 135539969562250
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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) = 25*a(n-2) +2*a(n-3) -199*a(n-4) +632*a(n-6) -30*a(n-7) -879*a(n-8) +28*a(n-9) +548*a(n-10) -139*a(n-12) -4*a(n-13) +10*a(n-14) for n>16
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EXAMPLE
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Some solutions for n=4
..1..0..1..0....0..1..1..1....0..1..0..1....0..1..0..0....1..0..1..0
..0..1..0..1....1..0..1..1....1..1..1..0....1..1..1..1....0..1..1..0
..1..0..1..1....1..1..0..0....1..0..1..0....1..0..1..1....1..1..0..0
..0..1..0..0....0..1..1..1....0..1..0..0....0..1..0..0....1..0..1..0
..1..0..1..0....1..0..1..1....1..1..1..0....1..1..1..1....0..1..1..0
..0..1..0..0....0..1..0..0....1..0..1..0....1..0..1..0....1..1..0..0
..1..1..1..0....1..0..1..1....0..1..0..0....0..1..0..0....1..0..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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