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A297631 Number of nXn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 2 or 3 neighboring 1s. 0
2, 8, 113, 2370, 201152, 36084211, 21730243952, 34434651958956, 160513915016803898, 2122969181828009056551 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A297637.

LINKS

Table of n, a(n) for n=1..10.

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 * A099292 A284967 A064111

Adjacent sequences:  A297628 A297629 A297630 * A297632 A297633 A297634

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 02 2018

STATUS

approved

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Last modified September 18 07:50 EDT 2019. Contains 327168 sequences. (Running on oeis4.)