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A297743
Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 3 or 4 neighboring 1's.
0
1, 5, 66, 852, 34159, 6379211, 2703029494, 2266768029479, 5448033721050367
OFFSET
1,2
COMMENTS
Diagonal of A297749.
EXAMPLE
Some solutions for n=5
..0..1..0..0..0. .0..0..1..0..1. .0..1..0..1..1. .0..0..1..0..0
..0..1..1..1..0. .0..0..0..1..1. .1..0..0..0..0. .0..1..1..0..0
..0..0..0..0..0. .0..1..1..0..0. .0..0..1..1..0. .0..0..1..0..0
..0..1..1..1..0. .1..1..1..1..1. .1..0..0..0..0. .1..0..0..0..0
..0..0..0..1..0. .0..1..1..0..0. .0..1..0..0..0. .0..1..0..1..1
CROSSREFS
Cf. A297749.
Sequence in context: A169934 A162443 A219678 * A279463 A361409 A367837
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 05 2018
STATUS
approved