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A281033
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Number of nX7 0..1 arrays with no element equal to more than three of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
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1
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0, 1048, 31700, 146606, 722952, 3042556, 12164474, 46511454, 172759149, 628675456, 2254017339, 7988988368, 28056053572, 97767659494, 338498139062, 1165614974008, 3995250761421, 13639469138120, 46401641163562
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=4
..0..0..0..1..1..0..1. .0..1..0..1..0..1..0. .0..0..1..0..1..0..1
..1..1..0..0..0..1..1. .1..0..1..0..1..0..1. .1..0..1..0..1..0..1
..0..1..1..1..1..1..0. .0..0..1..0..1..0..1. .1..0..1..0..0..0..1
..0..0..0..0..0..0..0. .1..0..1..0..0..1..0. .0..0..1..1..1..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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