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A304268
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Number of nX6 0..1 arrays with every element unequal to 0, 1, 5 or 8 king-move adjacent elements, with upper left element zero.
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1
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13, 13, 37, 116, 404, 1246, 3788, 12342, 39252, 122156, 388150, 1234248, 3885916, 12284744, 38942904, 123064868, 388956186, 1231020108, 3893434762, 12310010474, 38938978286, 123164661778, 389498928546, 1231896735244, 3896353516054
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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) = a(n-1) +2*a(n-2) +16*a(n-3) +7*a(n-4) -14*a(n-5) -45*a(n-6) -14*a(n-7) +5*a(n-8) +38*a(n-9) +13*a(n-10) -6*a(n-11) -6*a(n-12) for n>13
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EXAMPLE
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Some solutions for n=5
..0..0..0..0..0..0. .0..0..0..1..0..0. .0..0..0..0..0..0. .0..0..1..0..0..0
..0..1..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..1
..0..0..0..0..0..1. .0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..0
..0..0..0..0..0..0. .0..0..0..0..0..0. .0..1..0..0..1..0. .0..0..0..0..0..0
..0..1..0..0..0..0. .0..1..0..0..1..0. .0..0..0..0..0..0. .0..0..0..0..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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