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A300262
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Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
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1
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4, 26, 95, 375, 1526, 6198, 25034, 101312, 410252, 1660983, 6724306, 27224178, 110221701, 446249130, 1806706543, 7314734637, 29614856373, 119900405862, 485435683612, 1965362943182, 7957081971789, 32215501878934, 130429542917213
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OFFSET
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1,1
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COMMENTS
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Column 3 of A300267.
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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) -8*a(n-2) +4*a(n-3) -16*a(n-4) -3*a(n-5) +32*a(n-6) +13*a(n-7) +28*a(n-8) -91*a(n-9) +46*a(n-10) +5*a(n-11) +79*a(n-12) -38*a(n-13) -24*a(n-14) -22*a(n-15) -23*a(n-16) -7*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..1..1. .0..0..1. .0..1..0. .0..1..1. .0..0..0. .0..1..1. .0..0..0
..1..0..0. .1..0..0. .1..0..1. .1..1..0. .1..1..1. .1..1..0. .1..1..1
..1..0..1. .0..1..0. .0..0..0. .1..0..1. .0..0..0. .0..1..1. .1..1..1
..1..1..0. .0..1..1. .0..1..0. .0..0..1. .1..0..1. .1..1..0. .1..1..1
..0..1..1. .0..0..1. .1..0..1. .1..0..1. .1..0..0. .1..0..1. .0..0..0
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CROSSREFS
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Cf. A300267.
Sequence in context: A299003 A299670 A299748 * A359254 A222663 A267675
Adjacent sequences: A300259 A300260 A300261 * A300263 A300264 A300265
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Mar 01 2018
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STATUS
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approved
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