id:A081247 - OEIS Search Results

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Number of numbers k<=n with mu(k+n)=mu(k), where mu=A008683 (Moebius function).

+0
2

0, 0, 1, 2, 3, 1, 0, 5, 4, 3, 3, 7, 2, 4, 4, 10, 3, 6, 5, 12, 4, 3, 6, 16, 9, 6, 7, 13, 10, 10, 7, 16, 6, 9, 8, 25, 9, 9, 10, 22, 13, 13, 12, 19, 10, 9, 16, 29, 10, 16, 14, 24, 10, 21, 17, 31, 9, 13, 20, 37, 16, 14, 18, 30, 18, 20, 21, 35, 13, 16, 27, 49, 21, 15, 13, 42, 22, 25, 19, 39, 26 (list; graph; listen)

	OFFSET	`1,4`
	EXAMPLE	`n=10: mu(3+10)=mu(3)=-1, mu(7+10)=mu(7)=-1, mu(8+10)=mu(8)=0, and mu(k+10)<>mu(k) for k in {1,2,4,5,6,8,9}, therefore a(10)=3.`
	CROSSREFS	`Cf. A081248.` `Sequence in context: A115352 A038554 A100329 this_sequence A005210 A048994 A132393` `Adjacent sequences: A081244 A081245 A081246 this_sequence A081248 A081249 A081250`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Mar 12 2003`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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