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Search: id:A087989
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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
1
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OFFSET
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1,4
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EXAMPLE
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n=4: 4=24, a(4)=Sum[mu(j); j=1...24]=-2.
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MATHEMATICA
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s=0; i=1; Do[While[i<= n!, s=s+MoebiusMu[i]; i++ ]; Print[s], {n, 0, 10}]
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CROSSREFS
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Cf. A002321, A000142, A084237, A087987.
Sequence in context: A124063 A054630 A049875 this_sequence A103356 A028257 A100228
Adjacent sequences: A087986 A087987 A087988 this_sequence A087990 A087991 A087992
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KEYWORD
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more,sign
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Oct 02 2003
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