id:A076545 - OEIS Search Results

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sum[k=1 to n] mu(k)+sqf(k): mu(k) is Moebius function; sqf(k)=1 if k is squarefree, sqf(k)=-1 otherwise.

+0
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2, 2, 2, 1, 1, 3, 3, 2, 1, 3, 3, 2, 2, 4, 6, 5, 5, 4, 4, 3, 5, 7, 7, 6, 5, 7, 6, 5, 5, 5, 5, 4, 6, 8, 10, 9, 9, 11, 13, 12, 12, 12, 12, 11, 10, 12, 12, 11, 10, 9, 11, 10, 10, 9, 11, 10, 12, 14, 14, 13, 13, 15, 14, 13, 15, 15, 15, 14, 16, 16, 16, 15, 15, 17, 16, 15, 17, 17, 17, 16, 15 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`Sequence in context: A104754 A098593 A053821 this_sequence A118400 A087698 A101677` `Adjacent sequences: A076542 A076543 A076544 this_sequence A076546 A076547 A076548`
	KEYWORD	`easy,nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com; zakseidov(AT)yahoo.com), Oct 19 2002`

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Last modified July 6 17:22 EDT 2008. Contains 140988 sequences.

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