A305912 - OEIS

A305912

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

1, 5, 13, 101, 2014, 61467, 18643274, 12581159370, 17019760656259 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`Diagonal of A305918.`
	LINKS	`Table of n, a(n) for n=1..9.`
	EXAMPLE	`Some solutions for n=5` `..0..1..0..0..0. .0..0..1..0..1. .0..1..1..1..1. .0..0..0..1..1` `..0..0..0..0..0. .0..1..1..0..0. .1..1..1..1..0. .0..0..1..1..1` `..0..0..0..0..0. .1..1..1..0..0. .0..0..0..0..1. .0..1..1..1..1` `..0..0..0..0..0. .0..0..0..1..0. .1..0..0..0..0. .1..1..1..1..1` `..1..0..0..0..0. .1..0..0..0..0. .0..0..0..0..0. .1..1..1..1..0`
	CROSSREFS	`Cf. A305918.` `Sequence in context: A337749 A117340 A304348 * A180827 A117437 A179089` `Adjacent sequences: A305909 A305910 A305911 * A305913 A305914 A305915`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin, Jun 14 2018`
	STATUS	`approved`

Last modified March 23 09:28 EDT 2023. Contains 361443 sequences. (Running on oeis4.)