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A296314 Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1 neighboring 1. 1
1, 6, 32, 434, 12547, 676269, 78105580, 18043360170, 8435284786616, 8062065704707386, 15602483060688719807, 61357587200669343827967, 490367520450812937863879738, 7957358933563948031830555664333 (list; graph; refs; listen; history; text; internal format)
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: A185386 A276351 A135538 * A222605 A290790 A222749

Adjacent sequences:  A296311 A296312 A296313 * A296315 A296316 A296317

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 10 2017

STATUS

approved

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Last modified October 25 16:10 EDT 2021. Contains 348255 sequences. (Running on oeis4.)