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A303258
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Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
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1
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0, 1172, 28680, 349273, 11394429, 306224454, 7600681910, 204093228252, 5314350209386, 138643667659572, 3640560048826152, 95207607193735652, 2491557031345822081, 65239890207048823769, 1707524253811111768156
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OFFSET
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1,2
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COMMENTS
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Row 7 of A303254.
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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..0..0..0. .0..0..0..1..0. .0..0..0..1..0. .0..0..0..1..0
..0..0..1..1..0. .0..0..1..0..1. .0..0..1..0..1. .0..0..1..0..0
..1..0..1..0..1. .1..0..1..0..1. .1..0..1..1..1. .0..1..0..0..0
..0..1..1..1..0. .0..1..1..1..0. .1..1..1..0..1. .1..1..0..1..0
..0..1..0..0..0. .0..0..0..1..0. .1..0..0..0..0. .1..0..1..0..1
..0..0..0..1..0. .0..1..0..0..1. .1..1..0..1..1. .1..1..1..0..0
..1..1..0..1..1. .1..1..0..1..0. .0..0..0..1..1. .1..0..0..1..1
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CROSSREFS
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Cf. A303254.
Sequence in context: A302673 A230706 A302477 * A230738 A302386 A303107
Adjacent sequences: A303255 A303256 A303257 * A303259 A303260 A303261
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Apr 20 2018
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STATUS
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approved
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