A318017 - OEIS

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A318017

Number of nXn 0..1 arrays with every element unequal to 0, 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 6, 45, 569, 12039, 400016, 20241433, 1699138124, 223853493247, 46952248817665 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`Diagonal of A318024.`
	LINKS	`Table of n, a(n) for n=1..10.`
	EXAMPLE	`Some solutions for n=5` `..0..0..0..1..0. .0..1..0..1..1. .0..1..0..0..1. .0..0..1..0..1` `..1..0..0..0..0. .1..1..1..1..1. .0..0..0..1..0. .0..1..1..1..1` `..0..0..0..0..1. .1..1..0..1..1. .0..0..0..1..1. .0..0..1..1..1` `..0..1..0..0..0. .1..0..0..1..0. .1..1..1..1..1. .1..0..1..0..0` `..1..1..0..1..0. .0..0..0..0..0. .1..1..1..1..1. .0..1..1..0..1`
	CROSSREFS	`Cf. A318024.` `Sequence in context: A245493 A078865 A160492 * A356487 A322089 A273091` `Adjacent sequences: A318014 A318015 A318016 * A318018 A318019 A318020`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin, Aug 12 2018`
	STATUS	`approved`

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Last modified March 22 14:53 EDT 2023. Contains 361430 sequences. (Running on oeis4.)