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A063473
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M(2*n-1), where M(n) is Mertens' function (A002321): Sum_{1<=k<=n} mu(k), where mu = Moebius function (A008683).
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1
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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; internal format)
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OFFSET
| 1,3
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
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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) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 22 2009]
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CROSSREFS
| Cf. A002321, A008683.
Sequence in context: A090872 A194330 A194286 * A096859 A005086 A157372
Adjacent sequences: A063470 A063471 A063472 * A063474 A063475 A063476
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KEYWORD
| easy,sign
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AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Jul 27 2001
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