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A304132
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Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 6 king-move adjacent elements, with upper left element zero.
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1
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21, 103, 89, 244, 582, 1321, 2945, 6333, 13315, 28932, 63006, 134021, 284831, 607277, 1291893, 2755806, 5876374, 12482965, 26539285, 56520687, 120314557, 256086726, 545101754, 1160070321, 2469739659, 5259410891, 11198740071, 23845751230
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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 79 (see link above)
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EXAMPLE
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Some solutions for n=5
..0..0..1..1..1..0..0. .0..0..1..1..1..1..1. .0..0..1..1..0..0..0
..0..1..1..1..1..1..0. .0..1..1..1..1..1..0. .0..1..1..1..1..0..0
..1..1..1..1..0..0..0. .0..0..0..1..1..0..0. .1..1..1..1..1..1..0
..0..0..1..1..1..0..0. .0..0..1..1..1..1..1. .1..1..1..1..0..0..0
..0..1..1..1..1..1..0. .0..1..1..1..1..1..0. .1..1..1..1..1..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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