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A317067
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Number of nX3 0..1 arrays with every element unequal to 1, 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
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1
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1, 25, 153, 1161, 8529, 62866, 463269, 3413985, 25158651, 185401644, 1366280170, 10068527242, 74197988927, 546787174384, 4029438241977, 29694135683202, 218824967904159, 1612586643003039, 11883633326206072, 87574048591105435
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OFFSET
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1,2
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COMMENTS
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Column 3 of A317072.
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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) +8*a(n-3) +a(n-4) -5*a(n-5) -2*a(n-6) -a(n-7) -a(n-8)
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EXAMPLE
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Some solutions for n=5
..0..1..0. .0..1..1. .0..1..0. .0..1..0. .0..1..0. .0..0..1. .0..0..1
..0..1..1. .0..0..0. .0..0..0. .1..1..1. .0..1..0. .0..1..1. .1..0..0
..1..1..1. .0..0..0. .1..1..0. .0..1..0. .1..0..0. .0..1..0. .1..1..1
..1..0..0. .1..0..1. .0..0..1. .0..1..1. .0..1..1. .1..0..0. .1..0..0
..0..0..1. .1..0..1. .1..1..1. .1..0..1. .1..1..0. .0..1..1. .0..1..0
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CROSSREFS
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Cf. A317072.
Sequence in context: A215760 A305687 A147059 * A031211 A049522 A084073
Adjacent sequences: A317064 A317065 A317066 * A317068 A317069 A317070
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Jul 20 2018
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STATUS
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approved
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