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A295118
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Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 4 1s.
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1
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9, 85, 665, 5793, 49302, 420519, 3590821, 30650456, 261518933, 2232138695, 19050970320, 162588578831, 1387635803762, 11842933188678, 101074697830670, 862633152321378, 7362232721371648, 62833751476788374, 536261351701937815
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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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FORMULA
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Empirical recurrence of order 78 (see link above)
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EXAMPLE
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Some solutions for n=5
..0..0..1..1..0..0. .0..0..1..0..0..1. .1..0..0..1..1..0. .0..0..1..1..0..0
..1..0..0..0..0..1. .0..0..1..0..0..1. .1..0..0..0..0..1. .0..0..0..0..0..0
..1..0..1..1..0..1. .1..1..0..0..0..0. .0..1..1..0..0..1. .0..0..0..0..1..0
..0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..1..1..1
..0..0..0..1..1..0. .0..0..0..0..0..0. .0..1..1..0..0..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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