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Search: id:A072107
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(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Is there an expression for lim n -> infinity a(n)/n^2?
Equals row sums of triangle A140582. - Gary W. Adamson (qntmpkt(AT)yahoo.com), May 17 2008
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PROGRAM
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(PARI) for(n=2, 100, print1(1+sum(k=2, n, if(if(omega(k)-1, 0, 1)*component(component(factor(k), 1), 1), if(omega(k)-1, 0, 1)*component(component(factor(k), 1), 1), 1)), ", "))
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CROSSREFS
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Cf. A140582.
Sequence in context: A161909 A006048 A049827 this_sequence A084578 A070881 A046669
Adjacent sequences: A072104 A072105 A072106 this_sequence A072108 A072109 A072110
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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), Jun 19 2002
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