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A087989
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a(n) is the value of Mertens function at n!, the n-th factorial.
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0
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1, 0, -1, -2, -3, -3, -6, -15, -138, -26, -527, -3474, -19550
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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EXAMPLE
| n=4: 4=24, a(4)=Sum[mu(j); j=1...24]=-2.
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MATHEMATICA
| s=0; i=1; Do[While[i<= n!, s=s+MoebiusMu[i]; i++ ]; Print[s], {n, 0, 10}]
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CROSSREFS
| Cf. A002321, A000142, A084237, A087987.
Sequence in context: A049875 A180887 A173094 * A103356 A028257 A100228
Adjacent sequences: A087986 A087987 A087988 * A087990 A087991 A087992
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KEYWORD
| more,sign
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Oct 02 2003
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EXTENSIONS
| More terms from Sean A. Irvine (sairvin(AT)xtra.co.nz), Dec 06 2009
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