A305948 - OEIS

A305948

Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

1, 4, 23, 959, 126733, 52618569, 64233268442, 231757210785889, 2449990554327149088 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`Diagonal of A305954.`
	LINKS	`Table of n, a(n) for n=1..9.`
	EXAMPLE	`Some solutions for n=5` `..0..1..0..1..1. .0..1..0..0..1. .0..1..0..0..1. .0..1..0..1..0` `..0..1..1..0..0. .1..0..1..0..0. .0..1..1..0..1. .0..1..1..0..1` `..0..1..1..0..1. .0..1..0..1..0. .0..1..1..1..0. .0..0..1..0..0` `..0..0..0..0..1. .1..0..1..1..1. .0..1..1..0..1. .0..1..1..0..1` `..1..1..1..1..0. .0..1..0..0..0. .1..0..0..1..0. .1..0..1..1..0`
	CROSSREFS	`Cf. A305954.` `Sequence in context: A107765 A304413 A316240 * A317211 A145514 A305665` `Adjacent sequences: A305945 A305946 A305947 * A305949 A305950 A305951`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin, Jun 15 2018`
	STATUS	`approved`

Last modified March 26 23:26 EDT 2023. Contains 361553 sequences. (Running on oeis4.)