A305679 - OEIS

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A305679

Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

1, 4, 25, 1595, 383910, 351440611, 1172824606532, 14227138873003015, 624906012671792336577 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`Diagonal of A305685.`
	LINKS	`Table of n, a(n) for n=1..9.`
	EXAMPLE	`Some solutions for n=5` `..0..0..0..1..0. .0..1..0..0..0. .0..1..0..0..0. .0..1..0..1..0` `..1..1..0..0..1. .0..1..1..1..1. .0..1..0..1..1. .1..0..0..1..0` `..1..1..0..0..0. .0..0..0..0..1. .1..1..1..0..0. .0..1..0..0..1` `..0..0..1..0..1. .0..1..1..0..0. .1..0..0..1..1. .1..1..0..1..0` `..1..1..0..0..1. .1..0..0..1..1. .1..0..0..1..1. .0..1..0..1..0`
	CROSSREFS	`Cf. A305685.` `Sequence in context: A072882 A014253 A132553 * A317061 A144229 A316926` `Adjacent sequences: A305676 A305677 A305678 * A305680 A305681 A305682`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin, Jun 08 2018`
	STATUS	`approved`

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Last modified May 26 17:16 EDT 2022. Contains 354092 sequences. (Running on oeis4.)