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A297743 Number of nXn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 3 or 4 neighboring 1s. 0
1, 5, 66, 852, 34159, 6379211, 2703029494, 2266768029479, 5448033721050367 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A297749.

LINKS

Table of n, a(n) for n=1..9.

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 A209935 A156597

Adjacent sequences:  A297740 A297741 A297742 * A297744 A297745 A297746

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 05 2018

STATUS

approved

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Last modified January 27 14:39 EST 2020. Contains 331295 sequences. (Running on oeis4.)