A180751 - OEIS

A180751

Half the number of n X n binary arrays with each element equal to at least two neighbors

0, 1, 1, 9, 86, 2986, 205020, 33329847, 11843513563, 9371551715962, 16360949033733903 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,4`
	COMMENTS	`Diagonal of A180760`
	LINKS	`Table of n, a(n) for n=1..11.`
	CROSSREFS	`Sequence in context: A015581 A152261 A028339 * A266828 A100814 A055725` `Adjacent sequences: A180748 A180749 A180750 * A180752 A180753 A180754`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Sep 20 2010`
	STATUS	`approved`

Last modified January 26 22:13 EST 2023. Contains 359836 sequences. (Running on oeis4.)