id:A105590 - OEIS Search Results

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a(n)=n+2-sum{k=0..n, -mu(k-mod(k^3,3k))}

+0
1

1, 1, 1, 1, 1, 1, 3, 3, 3, 4, 4, 4, 5, 5, 5, 7, 7, 7, 8, 8, 8, 10, 10, 10, 11, 11, 11, 12, 12, 12, 12, 12, 12, 14, 14, 14, 15, 15, 15, 17, 17, 17, 17, 17, 17, 18, 18, 18, 19, 19, 19, 21, 21, 21, 22, 22, 22, 24, 24, 24, 25, 25, 25, 26, 26, 26, 26, 26, 26, 28, 28, 28, 29, 29, 29, 30 (list; graph; listen)

	OFFSET	`0,7`
	COMMENT	`A Moebius triple count.` `Numbers appear in triples or multiples of triples.`
	CROSSREFS	`Adjacent sequences: A105587 A105588 A105589 this_sequence A105591 A105592 A105593` `Sequence in context: A134849 A050501 A096056 this_sequence A073750 A120204 A069941`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 14 2005`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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