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A299835
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Number of nX4 0..1 arrays with every element equal 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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2, 64, 1000, 13850, 198202, 2853873, 41026724, 589665345, 8475712818, 121828795509, 1751145754781, 25170657077961, 361798588649774, 5200429172871619, 74750052326542025, 1074444076986377568
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OFFSET
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1,1
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COMMENTS
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Column 4 of A299839.
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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) = 14*a(n-1) +a(n-2) +68*a(n-3) -24*a(n-4) -702*a(n-5) -151*a(n-6) -1080*a(n-7) +2180*a(n-8) +6939*a(n-9) -2653*a(n-10) -6639*a(n-11) -3139*a(n-12) -3348*a(n-13) +8687*a(n-14) +5803*a(n-15) -5001*a(n-16) -1532*a(n-17) +484*a(n-18) -180*a(n-19) +281*a(n-20) -17*a(n-21) -6*a(n-22) for n>23
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EXAMPLE
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Some solutions for n=5
..0..0..0..0. .0..0..1..1. .0..0..1..1. .0..0..1..1. .0..0..0..1
..0..1..1..0. .0..1..0..1. .0..0..1..1. .1..0..0..1. .0..0..0..1
..0..0..1..1. .0..1..1..0. .0..0..0..0. .1..0..0..0. .1..0..1..1
..1..0..1..0. .0..1..0..0. .1..0..0..0. .0..1..1..0. .1..1..1..0
..1..0..0..1. .1..1..1..0. .1..1..1..0. .1..0..1..1. .1..1..0..0
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CROSSREFS
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Cf. A299839.
Sequence in context: A299138 A299933 A299063 * A299724 A047707 A223121
Adjacent sequences: A299832 A299833 A299834 * A299836 A299837 A299838
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Feb 20 2018
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STATUS
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approved
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