A189899 - OEIS

A189899

Number of n X n binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally

2, 16, 512, 35656, 6442436, 2719427244, 2662054379066, 6207537762978575 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Diagonal of A189905`
	LINKS	`Table of n, a(n) for n=1..8.`
	EXAMPLE	`Some solutions for 4X4` `..1..0..1..1....1..1..0..1....1..0..0..1....1..0..0..1....0..0..0..0` `..1..0..0..0....1..0..1..0....1..1..1..1....1..1..1..1....0..1..1..0` `..1..0..0..0....1..0..0..0....0..0..1..0....1..1..0..0....0..0..1..0` `..1..1..1..1....1..0..1..1....1..0..1..1....0..1..0..0....0..0..1..0`
	CROSSREFS	`Sequence in context: A012389 A009710 A012393 * A189335 A189773 A189152` `Adjacent sequences: A189896 A189897 A189898 * A189900 A189901 A189902`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin May 01 2011`
	STATUS	`approved`

Last modified April 1 19:13 EDT 2023. Contains 361695 sequences. (Running on oeis4.)