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A063473 a(n) = M(2*n-1), where M(n) is Mertens's function (A002321): Sum_{k=1..n} mu(k), where mu = Moebius function (A008683). 1
1, -1, -2, -2, -2, -2, -3, -1, -2, -3, -2, -2, -2, -1, -2, -4, -3, -1, -2, 0, -1, -3, -3, -3, -3, -2, -3, -2, -1, -1, -2, -1, 0, -2, -1, -3, -4, -3, -2, -4, -4, -4, -3, -1, -2, -1, 0, 2, 1, 1, 0, -2, -3, -3, -4, -4, -5, -5, -5, -3, -3, -1, -1, -2, -1, -3, -2, -1, -2, -4, -3, -1, 0, 1, 0, -1, -1, -1, -2, 0, 1, 0, -1, -1, -1, -2, -3, -4, -3 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
PROG
(PARI) M(n)=sum(k=1, n, moebius(k));
j=[]; for(n=1, 200, j=concat(j, M(2*n-1))); j
(PARI) { for (n=1, 1000, if (n>1, a+=moebius(2*n - 2) + moebius(2*n - 1), a=1); write("b063473.txt", n, " ", a) ) } \\ Harry J. Smith, Aug 22 2009
CROSSREFS
Sequence in context: A194330 A280667 A194286 * A096859 A301304 A005086
KEYWORD
easy,sign,changed
AUTHOR
Jason Earls, Jul 27 2001
STATUS
approved

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Last modified April 25 12:28 EDT 2024. Contains 371969 sequences. (Running on oeis4.)