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.

1, 10, 132, 5696, 742601, 263456105, 267838310277, 775597735818257, 6368326825456570489, 148644719322790247465982, 9857838321384193865155602133

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