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A302217
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Number of 7Xn 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
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1
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64, 21, 1065, 172, 6423, 8756, 55922, 465040, 1136003, 19265064, 60547641, 699553699, 3796928584, 26139308319, 214325335931, 1151196050162, 10992872734396, 60033419186727, 538343914163895, 3376563558675197
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=5
..0..1..1..0..1. .0..0..0..1..1. .0..1..1..0..0. .0..0..1..1..0
..1..1..0..0..0. .1..0..1..1..1. .1..1..0..0..1. .1..0..0..1..1
..0..0..1..1..1. .1..0..0..1..0. .0..1..1..0..0. .1..0..0..1..0
..0..0..1..1..0. .0..0..1..1..0. .0..1..1..0..0. .1..0..0..1..1
..1..0..0..1..0. .0..0..1..1..0. .0..1..0..0..1. .1..0..1..1..1
..1..0..1..1..1. .0..0..1..1..0. .1..1..0..0..1. .1..0..0..1..0
..0..0..0..1..0. .1..0..0..1..1. .1..1..1..0..0. .0..0..0..1..0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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