A213412 - OEIS

A213412

Half the number of n X n binary arrays with no 3X3 submatrix formed with any three rows and columns equal to J-I

1, 8, 253, 28952, 10142461, 9107867048, 18095156337973 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`Diagonal of A213418`
	LINKS	`Table of n, a(n) for n=1..7.`
	EXAMPLE	`Some solutions for n=4` `..1..1..1..1....1..0..1..1....1..0..0..1....1..0..1..1....1..0..0..0` `..0..0..0..0....0..0..1..1....1..0..1..0....1..1..0..1....1..0..1..1` `..1..1..1..1....1..0..1..0....1..0..1..1....0..1..0..1....0..0..1..1` `..0..0..1..0....1..1..0..0....0..0..1..0....0..0..0..1....0..0..0..0`
	CROSSREFS	`Sequence in context: A301401 A162132 A297051 * A226428 A277421 A171612` `Adjacent sequences: A213409 A213410 A213411 * A213413 A213414 A213415`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin and N. J. A. Sloane Jun 10 2012`
	STATUS	`approved`

Last modified March 31 21:40 EDT 2023. Contains 361673 sequences. (Running on oeis4.)