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A299748
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Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
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1
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4, 26, 95, 375, 1524, 6170, 24838, 100272, 405068, 1635673, 6604612, 26671526, 107707761, 434951162, 1756450581, 7093044669, 28643701145, 115671273734, 467113069416, 1886333772206, 7617545385889, 30761787301998, 124224736350037
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OFFSET
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1,1
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COMMENTS
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Column 3 of A299753.
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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) = 6*a(n-1) -9*a(n-2) +10*a(n-3) -25*a(n-4) -2*a(n-5) +47*a(n-6) -23*a(n-7) +74*a(n-8) -148*a(n-9) +86*a(n-10) -32*a(n-11) +100*a(n-12) -14*a(n-13) -28*a(n-14) -10*a(n-15) -19*a(n-16) -9*a(n-17) +4*a(n-18) for n>19
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EXAMPLE
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Some solutions for n=5
..0..0..1. .0..0..1. .0..0..1. .0..1..0. .0..0..0. .0..1..1. .0..0..1
..0..0..1. .0..1..0. .1..0..1. .0..1..0. .0..1..1. .0..1..0. .1..1..1
..0..0..1. .0..1..0. .1..0..1. .0..0..0. .0..1..1. .0..0..1. .0..0..0
..1..1..1. .1..0..0. .1..1..1. .0..1..0. .0..1..1. .0..1..0. .1..1..0
..0..0..0. .0..1..0. .0..1..0. .1..0..1. .0..0..0. .1..0..0. .0..1..0
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CROSSREFS
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Cf. A299753.
Sequence in context: A101166 A299003 A299670 * A300262 A359254 A222663
Adjacent sequences: A299745 A299746 A299747 * A299749 A299750 A299751
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Feb 18 2018
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STATUS
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approved
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