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A210007
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Number of (n+1)X4 0..2 arrays containing all values 0..2 with every 2X2 subblock having two or three distinct values, and new values 0..2 introduced in row major order
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1
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893, 70923, 5258039, 385841179, 28267925909, 2070471867089, 151644743405597, 11106638825609387, 813462442022950735, 59578874503149148763, 4363621497207730378229, 319596378000027147845681
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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) = 75*a(n-1) -30*a(n-2) -7001*a(n-3) -18089*a(n-4) +52126*a(n-5) +91400*a(n-6) -118464*a(n-7) -92992*a(n-8) +85632*a(n-9) -13824*a(n-10)
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EXAMPLE
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Some solutions for n=4
..0..0..0..1....0..0..0..0....0..0..0..0....0..0..0..1....0..0..0..0
..2..0..1..1....0..1..0..1....0..1..2..1....2..0..1..0....1..0..1..0
..2..1..1..0....1..2..2..2....0..0..2..0....0..2..1..1....2..1..0..0
..1..2..0..1....1..2..0..2....0..2..1..2....2..0..0..1....2..0..0..1
..1..2..0..2....1..2..1..1....1..1..1..1....2..2..2..1....2..0..1..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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