A217267 - OEIS

A217267

Number of n X n arrays of occupancy after each element moves to some horizontal or vertical neighbor.

0, 9, 1472, 2572816, 48909857500, 10211121295308649, 23397344246732649325860 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`Diagonal of A217273`
	LINKS	`Table of n, a(n) for n=1..7.`
	EXAMPLE	`Some solutions for n=3` `..1..1..2....2..1..1....0..0..1....2..1..1....0..2..1....0..1..2....1..1..0` `..1..0..2....2..1..0....3..1..2....1..0..1....1..0..1....1..1..3....1..0..0` `..1..1..0....0..2..0....2..0..0....1..2..0....1..1..2....0..0..1....1..3..2`
	CROSSREFS	`Sequence in context: A120347 A230172 A231191 * A300594 A203649 A187131` `Adjacent sequences: A217264 A217265 A217266 * A217268 A217269 A217270`
	KEYWORD	`nonn,hard,more`
	AUTHOR	`R. H. Hardin, Sep 29 2012`
	STATUS	`approved`

Last modified January 27 13:44 EST 2023. Contains 359844 sequences. (Running on oeis4.)