id:A102309 - OEIS Search Results

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Sum[d|n, moebius(d)*C(n/d,2) ].

+0
4

0, 0, 1, 3, 5, 10, 11, 21, 22, 33, 34, 55, 46, 78, 69, 92, 92, 136, 105, 171, 140, 186, 175, 253, 188, 290, 246, 315, 282, 406, 284, 465, 376, 470, 424, 564, 426, 666, 531, 660, 568, 820, 570, 903, 710, 852, 781, 1081, 760, 1155, 890 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`Zero followed by the Mobius transform of A000217. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 19 2009]`
	CROSSREFS	`First differences of A100448 (checked up to n=2000).` `Second column of triangle A020921.` `Sequence in context: A078430 A113858 A101130 this_sequence A067230 A075741 A119133` `Adjacent sequences: A102306 A102307 A102308 this_sequence A102310 A102311 A102312`
	KEYWORD	`nonn`
	AUTHOR	`Ralf Stephan, Jan 03 2005`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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