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A282373
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Number of nX4 0..1 arrays with no 1 equal to more than four of its king-move neighbors, with the exception of exactly two elements.
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1
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0, 6, 309, 6244, 119390, 2131096, 36258678, 594236950, 9502175342, 149094022594, 2303609997650, 35156424933146, 531063422607186, 7952651367000598, 118206136820451322, 1745636429854447262, 25632755261397583238
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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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FORMULA
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Empirical recurrence of order 54 (see link above)
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EXAMPLE
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Some solutions for n=4
..1..0..1..1. .0..1..0..1. .1..0..0..0. .0..0..1..1. .1..1..0..0
..1..0..0..1. .1..1..1..1. .1..0..1..1. .1..1..0..1. .0..1..1..0
..1..1..1..0. .1..0..1..0. .0..1..1..0. .0..1..1..1. .1..0..1..1
..1..1..1..0. .0..0..0..0. .0..1..1..1. .1..1..1..0. .0..0..1..1
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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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