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A296637 Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1, 2 or 4 neighboring 1's. 0
1, 10, 132, 5696, 742601, 263456105, 267838310277, 775597735818257, 6368326825456570489, 148644719322790247465982, 9857838321384193865155602133 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A296643.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A296643.

Sequence in context: A239814 A166771 A264279 * A223407 A203325 A324421

Adjacent sequences: A296634 A296635 A296636 * A296638 A296639 A296640

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 17 2017

STATUS

approved

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Last modified March 26 17:26 EDT 2023. Contains 361551 sequences. (Running on oeis4.)