A305636 - OEIS

A305636

Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

1, 4, 29, 334, 8734, 385282, 42274045, 12972861669, 10445509134407 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`Diagonal of A305642.`
	LINKS	`Table of n, a(n) for n=1..9.`
	EXAMPLE	`Some solutions for n=5` `..0..0..1..1..0. .0..0..1..1..1. .0..0..1..1..1. .0..1..1..0..0` `..0..0..1..1..0. .0..1..0..1..1. .0..0..1..1..0. .0..0..0..0..0` `..1..0..1..0..0. .0..1..0..0..0. .1..1..1..1..1. .0..0..0..0..1` `..1..0..1..0..0. .1..1..0..1..1. .1..1..1..1..0. .1..0..0..0..1` `..1..1..0..0..0. .1..1..0..1..1. .1..0..0..1..1. .1..0..0..0..0`
	CROSSREFS	`Cf. A305642.` `Sequence in context: A118795 A325478 A099700 * A276728 A256006 A137646` `Adjacent sequences: A305633 A305634 A305635 * A305637 A305638 A305639`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin, Jun 07 2018`
	STATUS	`approved`

Last modified April 1 22:19 EDT 2023. Contains 361716 sequences. (Running on oeis4.)