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A297320
Number of 7Xn 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1s.
1
1, 1897, 85041, 1717882, 90535227, 4869858862, 197589351469, 8462603863772, 387143404127578, 17208423873690915, 757092974470971658, 33594816998930823407, 1491858261000140438998, 66127149761814467849317
OFFSET
1,2
COMMENTS
Row 7 of A297314.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..1..1
..0..1..0..1..0. .0..0..1..1..1. .0..1..0..0..0. .0..1..0..1..0
..1..1..0..0..0. .0..1..0..1..0. .1..1..1..0..0. .1..0..0..0..0
..1..1..1..0..0. .1..0..0..1..1. .0..0..0..0..0. .0..0..0..0..0
..0..0..0..1..1. .0..0..0..1..0. .0..1..1..1..1. .0..0..1..1..1
CROSSREFS
Cf. A297314.
Sequence in context: A020417 A218848 A219427 * A220392 A219416 A221041
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 28 2017
STATUS
approved