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A297451
Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0 or 2 neighboring 1's.
0
2, 8, 92, 1677, 97005, 8800153, 2300975096, 1078420953679, 1299213136815377, 3046735975885152987, 17269379808592526211295, 200109250657229443895686946
OFFSET
1,1
COMMENTS
Diagonal of A297457.
EXAMPLE
Some solutions for n=5
..1..0..0..0..0. .1..1..0..0..1. .0..0..0..0..0. .0..0..1..0..0
..0..0..1..1..1. .1..1..0..0..1. .0..0..0..0..0. .1..0..1..0..0
..0..0..0..1..0. .0..0..0..0..1. .1..0..0..0..0. .1..0..1..0..1
..0..0..0..0..0. .0..0..1..0..0. .1..0..0..0..0. .1..0..1..0..0
..0..0..0..0..1. .1..0..0..0..0. .0..0..0..0..1. .1..0..1..0..0
CROSSREFS
Cf. A297457.
Sequence in context: A067964 A102895 A372949 * A295773 A319125 A297688
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 30 2017
STATUS
approved