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A302315
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Number of 7Xn 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
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1
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64, 86, 336, 1090, 3915, 18990, 76642, 360898, 1695748, 9408402, 50431855, 270054791, 1483688723, 8638547369, 49555516908, 278416318505, 1587868618303, 9269491523649, 53654294707162, 306415770314870, 1762671922872075
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OFFSET
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1,1
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COMMENTS
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Row 7 of A302309.
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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..1..1..1..0. .0..1..0..1..0. .0..1..0..0..1. .0..1..0..1..0
..0..1..0..1..0. .1..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0
..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0
..0..1..0..1..0. .0..1..0..1..1. .0..1..0..1..0. .1..1..0..1..0
..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0
..0..1..0..1..1. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0
..1..0..0..1..0. .0..1..0..0..0. .0..1..0..0..1. .0..0..0..1..0
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CROSSREFS
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Cf. A302309.
Sequence in context: A302640 A302432 A303202 * A303045 A302882 A303530
Adjacent sequences: A302312 A302313 A302314 * A302316 A302317 A302318
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Apr 05 2018
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STATUS
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approved
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