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A295414
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Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 3 1s.
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1
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21, 1632, 68613, 3019079, 136204120, 6093564449, 272714953724, 12210363190599, 546643613178667, 24472619590752067, 1095614774297460793, 49049522462925007446, 2195896628441171409216, 98308031733968098712078
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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..0..0..1..1. .0..0..0..1..1..0. .0..0..0..1..1..0. .0..0..1..0..1..1
..0..0..1..1..0..1. .0..0..0..0..1..1. .0..0..0..1..0..0. .0..0..1..0..1..1
..0..0..0..1..0..0. .0..0..0..1..1..0. .0..0..0..0..1..1. .0..0..0..0..1..0
..0..0..0..0..1..0. .0..0..0..1..0..0. .0..0..1..0..1..0. .0..0..0..1..1..1
..0..0..1..1..1..1. .0..0..0..1..1..0. .0..0..1..0..1..0. .0..0..0..0..0..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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