A145247 - OEIS

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A145247

1/6 of the number of 6-colorings of an n X n array symmetric under 180 degree rotation.

1, 5, 445, 38945, 61129245, 94304065705, 2610924486436445, 71050577480317387425 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	CROSSREFS	`Sequence in context: A199090 A038003 A054332 * A177026 A055305 A144509` `Adjacent sequences: A145244 A145245 A145246 * A145248 A145249 A145250`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net), Oct 05 2008`

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Last modified February 17 10:05 EST 2012. Contains 206009 sequences.