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A301967
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Number of 5Xn 0..1 arrays with every element equal to 0, 1 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.
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1
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16, 89, 100, 169, 311, 749, 1803, 4257, 10353, 25491, 62623, 154129, 380187, 938001, 2314659, 5713631, 14105377, 34823513, 85976895, 212277137, 524117847, 1294070913, 3195138873, 7889010751, 19478522291, 48093894353, 118747410843
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OFFSET
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1,1
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COMMENTS
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Row 5 of A301964.
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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) = 3*a(n-1) -2*a(n-2) +5*a(n-3) -8*a(n-4) +2*a(n-5) -9*a(n-6) +7*a(n-7) -a(n-8) +8*a(n-9) +a(n-10) -4*a(n-11) -3*a(n-13) +2*a(n-14) for n>17
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EXAMPLE
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Some solutions for n=5
..0..1..0..0..1. .0..0..1..0..0. .0..1..1..0..1. .0..1..0..1..0
..0..1..1..0..1. .1..0..1..1..0. .0..0..1..0..0. .0..0..0..1..0
..0..0..1..0..1. .1..0..0..1..1. .1..0..1..1..0. .0..1..0..0..0
..1..1..1..0..1. .1..1..0..0..1. .1..0..0..1..1. .0..1..0..1..1
..1..0..1..0..0. .0..1..1..0..0. .1..1..0..0..1. .0..1..0..0..1
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CROSSREFS
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Cf. A301964.
Sequence in context: A309271 A120045 A301794 * A208640 A301888 A302084
Adjacent sequences: A301964 A301965 A301966 * A301968 A301969 A301970
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Mar 29 2018
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STATUS
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approved
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