A047942 - OEIS

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A047942

Number of 7-colorings of an n X n grid, up to rotational symmetry.

1, 7, 616, 10092775, 8308234084801, 335267154940213889575, 662932711464913775048175499816, 64230894380264719522488136461023341060807 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	FORMULA	`a(n) = (m^(n^2) + 2 m^((n^2 + 3 (n mod 2))/4) + m^((n^2 + (n mod 2))/2))/4, with m = 7`
	CROSSREFS	`Cf. A047937-A047945.` `Sequence in context: A153405 A203680 A087772 * A175601 A109542 A052132` `Adjacent sequences: A047939 A047940 A047941 * A047943 A047944 A047945`
	KEYWORD	`nonn`
	AUTHOR	`Robert W. Pratt (Rob.Pratt(AT)sas.com)`

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Last modified February 16 17:48 EST 2012. Contains 205939 sequences.