id:A047942 - OEIS Search Results

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

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1, 7, 616, 10092775, 8308234084801, 335267154940213889575, 662932711464913775048175499816, 64230894380264719522488136461023341060807 (list; graph; listen)

	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: A080810 A153405 A087772 this_sequence A109542 A052132 A052134` `Adjacent sequences: A047939 A047940 A047941 this_sequence A047943 A047944 A047945`
	KEYWORD	`nonn`
	AUTHOR	`Robert W. Pratt (Rob.Pratt(AT)sas.com)`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

AT&T Labs Research