A145245 - OEIS

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A145245

1/5 of the number of 5-colorings of an n X n array symmetric under 180 degree rotation.

1, 4, 172, 7168, 3254620, 1429959400, 6856279647904, 31816048080263248, 1611557504007762068188 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	CROSSREFS	`Sequence in context: A181191 A057140 A195631 * A081783 A006433 A113254` `Adjacent sequences: A145242 A145243 A145244 * A145246 A145247 A145248`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net), Oct 05 2008`

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Last modified February 16 01:31 EST 2012. Contains 205860 sequences.