A145260 - OEIS

A145260

1/9 of the number of 9-colorings of an n X n array symmetric under 180 degree rotation.

1, 8, 3256, 1319648, 27265229496, 560946752022448 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	LINKS	`Table of n, a(n) for n=1..6.`
	CROSSREFS	`Sequence in context: A217270 A137565 A281323 * A201100 A079177 A298279` `Adjacent sequences: A145257 A145258 A145259 * A145261 A145262 A145263`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin, Oct 05 2008`
	STATUS	`approved`

Last modified January 31 22:24 EST 2023. Contains 359981 sequences. (Running on oeis4.)