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A206468
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Number of (n+1)X5 0..2 arrays with every 2X2 subblock having zero permanent
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1
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1849, 106891, 1896129, 68352739, 1693734025, 52552339515, 1457044540561, 43214597865811, 1240051361495769, 36294544907153707, 1052106476736321889, 30674877583244503491, 891844034416624515625, 25973093752500918767899
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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) = 39*a(n-1) -11348*a(n-3) +76272*a(n-4) +429792*a(n-5) -3994496*a(n-6) +37171200*a(n-8) -43614208*a(n-9)
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EXAMPLE
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Some solutions for n=4
..1..1..1..2..1....0..0..2..1..1....0..0..2..2..2....2..0..0..1..1
..0..0..0..0..0....2..0..0..0..0....1..0..0..0..0....2..0..0..0..0
..1..2..0..1..2....2..0..1..2..1....1..0..0..2..1....0..0..2..2..0
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..1..2..0..1....1..0..1..2..0....2..1..0..0..2....2..2..2..1..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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