A296314 Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1 neighboring 1.

1, 6, 32, 434, 12547, 676269, 78105580, 18043360170, 8435284786616, 8062065704707386, 15602483060688719807, 61357587200669343827967, 490367520450812937863879738, 7957358933563948031830555664333

Offset

1,2

Comments

Diagonal of A296320.

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

Some solutions for n=5
..1..1..0..1..0. .1..0..0..0..0. .0..0..0..0..0. .0..0..0..1..0
..0..0..0..1..0. .1..0..0..1..1. .1..0..0..1..0. .0..0..1..0..1
..0..0..0..0..0. .0..0..0..0..0. .1..0..1..0..0. .0..0..0..1..0
..1..0..1..1..0. .1..0..1..1..0. .0..0..0..1..0. .1..0..0..0..1
..1..0..0..0..0. .1..0..0..0..0. .1..1..0..1..0. .1..0..0..1..0

Crossrefs

Cf. A296320.

Sequence in context: A368287 A276351 A135538 * A222605 A290790 A222749

Adjacent sequences: A296311 A296312 A296313 * A296315 A296316 A296317

Keyword

nonn

Author

R. H. Hardin, Dec 10 2017

Status

approved