id:A081237 - OEIS Search Results

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Numbers n with no k, 0<k<n, such that mu(n-k)=mu(n)=mu(n+k), where mu=A008683 (Moebius function).

+0
2

1, 2, 3, 4, 6, 9, 15, 21 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`A081236(n)=0.` `Conjecture: there are no more terms.`
	CROSSREFS	`Sequence in context: A001115 A096824 A089797 this_sequence A022159 A022161 A127604` `Adjacent sequences: A081234 A081235 A081236 this_sequence A081238 A081239 A081240`
	KEYWORD	`nonn,more`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 11 2003`

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Last modified September 5 23:56 EDT 2008. Contains 143485 sequences.