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Search: id:A069811
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| A069811 |
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a(n)=sum(k=1,n,omega(k)^2). |
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+0
2
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| 0, 1, 2, 3, 4, 8, 9, 10, 11, 15, 16, 20, 21, 25, 29, 30, 31, 35, 36, 40, 44, 48, 49, 53, 54, 58, 59, 63, 64, 73, 74, 75, 79, 83, 87, 91, 92, 96, 100, 104, 105, 114, 115, 119, 123, 127, 128, 132, 133, 137, 141, 145, 146, 150, 154, 158, 162, 166, 167, 176, 177, 181
(list; graph; listen)
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OFFSET
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1,3
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REFERENCES
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Hardy and Wright,"An introduction to the theory of numbers", Fifth edition, Oxford university press, Chap.XXII, p. 357
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FORMULA
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a(n)=sum(k=1, n, A001221(k)^2); a(n)=n*Log(Log(n))^2+O(n*Log(log(n)))
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CROSSREFS
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Equals (A074787(n)-1)/4.
Sequence in context: A061887 A005455 A047338 this_sequence A004826 A132115 A047228
Adjacent sequences: A069808 A069809 A069810 this_sequence A069812 A069813 A069814
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KEYWORD
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easy,nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 30 2002
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