Search: id:A111060
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%I A111060
%S A111060 0,2,3,5,5,7,7,11,13,9,8,17,19,10,13,23,15,29,10,31,14,19,12,37,21,16,
%T A111060 41,12,43,25,47,20,53,16,22,31,59,61,33,18,16,67,26,14,71,73,39,18,18,
%U A111060 79,43,83,22,45,32,89,20,34,49,24,97,101,22,103,15,55,107,109,18,40,113
%N A111060 a(n) = sum of primes dividing the n-th squarefree positive integer.
%H A111060 Leroy Quet, <a href="http://www.prism-of-spirals.net/">Home Page</a> 
               (listed in lieu of email address)
%F A111060 a(n) = A008472(A005117(n)) = A001414(A005117(n))
%e A111060 Since the 5th squarefree positive integers is 6 = 2*3, the 5th term of 
               the sequence is 2 + 3 = 5.
%o A111060 (PARI) {for(n=1,113,if(issquarefree(n),f=factor(n)[,1];print1(sum(j=1,
               length(f),f[j]),",")))}
%Y A111060 Cf. A005117, A008472, A001414.
%Y A111060 Sequence in context: A113459 A159477 A123318 this_sequence A082432 A037153 
               A077724
%Y A111060 Adjacent sequences: A111057 A111058 A111059 this_sequence A111061 A111062 
               A111063
%K A111060 nonn
%O A111060 1,2
%A A111060 Leroy Quet Oct 07 2005
%E A111060 More terms from Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Oct 
               08 2005

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