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A208838
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Number of nX6 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 1 0 vertically
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2
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26, 676, 2430, 9801, 49126, 272206, 1644265, 10399480, 67895010, 451450105, 3037317426, 20579585922, 140057351785, 955762122172, 6533166024022, 44704031815465, 306089086744206, 2096624267502790, 14364797790087081
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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) = 11*a(n-1) -17*a(n-2) -124*a(n-3) +276*a(n-4) +396*a(n-5) -902*a(n-6) -462*a(n-7) +946*a(n-8) +220*a(n-9) -340*a(n-10) -44*a(n-11) +39*a(n-12) +3*a(n-13) -a(n-14) for n>15
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EXAMPLE
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Some solutions for n=4
..0..1..0..1..0..1....0..1..1..1..0..0....0..1..1..1..1..1....1..1..0..1..0..0
..0..1..0..1..1..0....1..1..1..1..1..1....1..0..1..1..0..0....1..0..1..1..1..1
..1..1..0..1..0..1....0..1..1..1..0..0....0..1..1..1..1..1....1..1..0..1..0..0
..0..1..0..1..0..0....0..1..1..1..0..0....1..0..1..1..0..0....1..0..1..1..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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