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 A105591 a(n)=n+2-sum{k=0..n, -mu(k-mod(k^5,5k))} 0
 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 19, 19, 19 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,11 COMMENTS A Moebius quintuple count. Numbers appear in quintuples or multiples of quintuples. LINKS CROSSREFS Sequence in context: A213809 A204854 A113215 * A130497 A178154 A270774 Adjacent sequences: A105588 A105589 A105590 * A105592 A105593 A105594 KEYWORD easy,nonn AUTHOR Paul Barry, Apr 14 2005 STATUS approved

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Last modified November 28 02:51 EST 2022. Contains 358406 sequences. (Running on oeis4.)