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A297538 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 3 neighboring 1's. 0
1, 2, 35, 275, 12161, 3015179, 1610981344, 1479214192234, 4028895802966726, 43695679891258322395 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A297544.

LINKS

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

EXAMPLE

Some solutions for n=5

..0..0..0..0..0. .1..1..0..1..1. .0..0..0..1..1. .0..1..1..0..0

..0..0..0..1..0. .1..1..0..1..1. .1..1..0..1..1. .1..1..0..1..1

..0..0..1..1..1. .1..1..0..1..0. .1..1..0..0..0. .0..0..0..1..1

..1..1..0..0..0. .1..0..0..1..1. .0..0..0..1..0. .1..1..0..0..1

..0..1..1..0..0. .0..1..1..1..1. .0..0..1..1..1. .1..1..1..1..0

CROSSREFS

Cf. A297544.

Sequence in context: A282727 A042353 A193576 * A089660 A058089 A055519

Adjacent sequences:  A297535 A297536 A297537 * A297539 A297540 A297541

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 31 2017

STATUS

approved

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Last modified October 21 02:29 EDT 2021. Contains 348141 sequences. (Running on oeis4.)