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A300644
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Number of nX6 0..1 arrays with every element equal to 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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0, 19, 104, 1789, 28089, 456649, 7455411, 121708555, 1990954802, 32547397369, 532327808168, 8705226732028, 142365129531729, 2328217142648763, 38075317550124085, 622678903591246459, 10183203860874999028
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OFFSET
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1,2
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COMMENTS
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Column 6 of A300646.
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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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EXAMPLE
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Some solutions for n=5
..0..0..1..1..1..1. .0..0..1..0..0..1. .0..0..1..0..0..1. .0..0..0..0..0..0
..0..1..1..0..1..1. .0..1..1..0..1..1. .0..1..1..0..1..1. .0..0..0..0..0..0
..0..0..0..0..0..1. .1..1..0..0..1..0. .0..0..1..0..1..0. .0..1..1..0..1..0
..0..1..1..0..0..1. .0..0..1..1..0..0. .0..1..1..0..0..0. .0..1..0..1..1..0
..1..1..0..0..1..1. .0..1..1..0..0..0. .0..0..0..0..0..0. .0..0..0..1..0..0
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CROSSREFS
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Cf. A300646.
Sequence in context: A195461 A096328 A184190 * A142300 A238108 A129081
Adjacent sequences: A300641 A300642 A300643 * A300645 A300646 A300647
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Mar 10 2018
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STATUS
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approved
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