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A297631
Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 2 or 3 neighboring 1's.
0
2, 8, 113, 2370, 201152, 36084211, 21730243952, 34434651958956, 160513915016803898, 2122969181828009056551
OFFSET
1,1
COMMENTS
Diagonal of A297637.
EXAMPLE
Some solutions for n=4
..0..0..0..1. .1..1..0..0. .0..0..1..0. .1..1..0..0. .0..0..0..0
..0..0..0..0. .0..1..1..1. .1..0..0..0. .1..1..0..1. .1..1..0..1
..1..1..0..0. .0..0..1..0. .1..0..1..0. .0..0..0..0. .1..1..0..0
..1..1..1..0. .1..0..1..0. .1..0..1..0. .1..0..0..0. .1..1..0..1
CROSSREFS
Cf. A297637.
Sequence in context: A012343 A012347 A263249 * A374380 A099292 A284967
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 02 2018
STATUS
approved