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A205286
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Number of (n+1)X2 0..2 arrays with permanents of 2X2 subblocks differing from horizontal and vertical neighbor permanents
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2
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81, 476, 2766, 15728, 89630, 511044, 2913944, 16611380, 94699360, 539880924, 3077859284, 17546758636, 100033478620, 570287962208, 3251195031144, 18534964466228, 105667273378104, 602405957212488, 3434298293663288
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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) = 9*a(n-2) +54*a(n-3) +283*a(n-4) +688*a(n-5) +1396*a(n-6) +2004*a(n-7) -212*a(n-8) -4692*a(n-9) -13221*a(n-10) -22814*a(n-11) -14278*a(n-12) +4640*a(n-13) +31376*a(n-14) +58752*a(n-15) +41064*a(n-16) +7728*a(n-17) for n>19
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EXAMPLE
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Some solutions for n=4
..1..1....1..1....1..0....0..1....1..2....2..1....0..0....0..0....2..1....2..1
..1..2....0..1....1..2....1..2....1..2....1..1....0..2....0..2....1..1....1..2
..1..2....0..1....2..1....0..2....0..1....1..0....2..0....1..2....2..2....0..1
..1..1....1..2....2..2....2..1....2..1....0..2....0..1....0..1....1..2....2..1
..1..0....2..0....1..0....2..2....2..1....2..2....0..1....0..0....1..1....0..2
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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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