id:A047941 - OEIS Search Results

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Number of 6-colorings of an n X n grid, up to rotational symmetry.

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1, 6, 336, 2521476, 705277897416, 7107572010747738816, 2578606199622659276537193216, 33678386561031835867238388699701784576, 15835071665743319426540573726368249140484891508736 (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 = 6`
	CROSSREFS	`Cf. A047937-A047945.` `Sequence in context: A001509 A003031 A144849 this_sequence A000409 A059415 A002684` `Adjacent sequences: A047938 A047939 A047940 this_sequence A047942 A047943 A047944`
	KEYWORD	`nonn`
	AUTHOR	`Robert W. Pratt (Rob.Pratt(AT)sas.com)`

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Last modified November 23 10:40 EST 2009. Contains 167421 sequences.

AT&T Labs Research