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A205057
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Number of (n+1)X2 0..2 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing
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2
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81, 491, 2830, 14206, 68508, 311076, 1375313, 5904417, 24933375, 103696183, 427081054, 1744729352, 7088213440, 28671903248, 115624112159, 465198328593, 1868598182563, 7496692149869, 30050430752062, 120382149539840
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OFFSET
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1,1
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COMMENTS
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Column 1 of A205063
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = 9*a(n-1) -9*a(n-2) -130*a(n-3) +330*a(n-4) +668*a(n-5) -2784*a(n-6) -966*a(n-7) +11477*a(n-8) -4085*a(n-9) -26019*a(n-10) +21040*a(n-11) +31242*a(n-12) -39912*a(n-13) -14020*a(n-14) +35744*a(n-15) -6168*a(n-16) -11920*a(n-17) +6272*a(n-18) -768*a(n-19)
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EXAMPLE
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Some solutions for n=4
..0..1....1..2....0..2....2..0....2..2....2..1....1..1....1..2....0..1....1..0
..2..2....1..1....1..1....0..2....0..2....0..2....1..0....1..2....1..2....0..1
..0..1....1..2....2..0....2..0....2..1....2..2....1..2....2..1....2..2....1..1
..2..2....1..1....0..1....1..2....1..2....1..1....2..1....2..2....1..2....0..2
..0..1....1..2....2..2....1..2....2..2....2..2....2..2....2..2....2..2....1..2
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CROSSREFS
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Sequence in context: A304617 A205206 A205063 * A235756 A235531 A235527
Adjacent sequences: A205054 A205055 A205056 * A205058 A205059 A205060
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Jan 21 2012
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STATUS
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approved
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