id:A059518 - OEIS Search Results

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a(n)/n^2 is the minimal average squared euclidian distance of n points to their center of gravity among all configurations of n points on the hexagonal lattice.

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0, 1, 3, 8, 17, 29, 42, 69, 99, 135, 181, 228, 299, 371, 464, 560, 668, 788, 912, 1093, 1275, 1463, 1667, 1895, 2137, 2403, 2673, 2997, 3346, 3705, 4092, 4503, 4923, 5370, 5853, 6363, 6882, 7512, 8154, 8813, 9488, 10164, 10924, 11963, 12506, 13361 (list; graph; listen)

	OFFSET	`1,3`
	EXAMPLE	`a(2)=1 because the squared distance of (0,0) and of (1,0) to their center of gravity (1/2,0) is 1/4, resulting in an average of 1/4 = a(2)/2^2.`
	CROSSREFS	`Sequence in context: A079666 A048230 A073433 this_sequence A024929 A033816 A011889` `Adjacent sequences: A059515 A059516 A059517 this_sequence A059519 A059520 A059521`
	KEYWORD	`nonn,nice`
	AUTHOR	`Zsolt Kukorelly (kukorell(AT)code.ucsd.edu), Feb 15 2001`

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Last modified December 2 15:58 EST 2008. Contains 150992 sequences.

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