login
A297688
Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 2 or 4 neighboring 1's.
0
2, 8, 95, 1774, 118791, 11111767, 3487451085, 1850472873182, 2768394831638120, 7867145123568861993, 58453835779489216413942
OFFSET
1,1
COMMENTS
Diagonal of A297694.
EXAMPLE
Some solutions for n=5
..0..0..1..0..0. .1..0..0..0..1. .1..0..0..1..1. .1..0..0..0..0
..1..0..0..0..0. .0..0..1..0..0. .1..0..1..1..0. .0..0..0..1..1
..0..0..1..1..1. .0..0..1..0..1. .0..0..0..0..0. .0..0..0..1..1
..1..0..1..1..1. .1..0..0..0..1. .1..0..0..0..1. .1..1..0..0..0
..1..0..0..0..0. .1..0..1..0..1. .1..0..1..0..1. .0..1..1..0..0
CROSSREFS
Cf. A297694.
Sequence in context: A297451 A295773 A319125 * A377674 A126429 A349267
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2018
STATUS
approved