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A296152
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Number of nX3 0..1 arrays with each 1 adjacent to 3 or 5 king-move neighboring 1s.
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1
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1, 4, 9, 16, 34, 76, 157, 325, 692, 1459, 3064, 6460, 13602, 28711, 60557, 127434, 269291, 568608, 1197256, 2531332, 5349057, 11272003, 23844290, 50418087, 106327692, 225034106, 476101282, 1004782085, 2127548485, 4503616178
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OFFSET
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1,2
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COMMENTS
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Column 3 of A296157.
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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-3) +5*a(n-4) +7*a(n-5) -44*a(n-6) -41*a(n-7) -63*a(n-8) -11*a(n-9) -21*a(n-10) -a(n-11) -20*a(n-12) -2*a(n-13) -2*a(n-14) +4*a(n-15)
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EXAMPLE
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Some solutions for n=7
..0..0..0. .0..0..0. .0..0..0. .1..1..1. .1..1..0. .1..1..0. .0..0..0
..1..1..1. .1..1..0. .0..0..0. .1..1..1. .1..1..0. .1..1..0. .1..1..0
..1..1..1. .1..1..0. .1..1..1. .0..0..0. .0..0..0. .0..0..0. .1..1..0
..0..0..0. .0..0..0. .1..1..1. .0..0..0. .1..1..1. .0..0..0. .0..0..0
..0..0..0. .1..1..0. .0..0..0. .0..1..1. .1..1..1. .0..0..0. .0..0..0
..1..1..0. .1..1..0. .1..1..1. .0..1..1. .0..0..0. .0..1..1. .0..1..1
..1..1..0. .1..1..0. .1..1..1. .0..1..1. .0..0..0. .0..1..1. .0..1..1
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CROSSREFS
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Cf. A296157.
Sequence in context: A068037 A167188 A295720 * A014764 A100498 A068952
Adjacent sequences: A296149 A296150 A296151 * A296153 A296154 A296155
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Dec 06 2017
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STATUS
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approved
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