%I A030230
%S A030230 2,3,4,5,7,8,9,11,13,16,17,19,23,25,27,29,30,31,32,37,41,42,43,47,49,53,
%T A030230 59,60,61,64,66,67,70,71,73,78,79,81,83,84,89,90,97,101,102,103,105,107,
%U A030230 109,110,113,114,120,121,125,126,127,128,130,131,132,137,138,139,140,149
%N A030230 Numbers n such that number of distinct primes dividing n is odd.
%C A030230 GCD[A008472(a[n]), A007947(a[n])]>1; see A014963. - Labos E. (labos(AT)ana.sote.hu), 
               Mar 26 2003
%H A030230 T. D. Noe, <a href="b030230.txt">Table of n, a(n) for n=1..1000</a>
%F A030230 n such that sum(d|n, mu(d)*tau(d))=(-1)^omega(n)=-1 where mu(d)=A008683(d), 
               tau(d)=A000005(d) and omega(d)=A001221(d). - Benoit Cloitre, Dec 
               08 2002
%F A030230 n such that sum(d|n, mu(d)*tau(d))=(-1)^omega(n)=-1 where mu(d)=A008683(d), 
               tau(d)=A000005(d) and omega(d)=A001221(d). n such that A023900(n)<0 
               - Benoit Cloitre, Dec 08 2002
%Y A030230 Cf. A030231.
%Y A030230 Sequence in context: A133811 A119314 A014567 this_sequence A089352 A086486 
               A071139
%Y A030230 Adjacent sequences: A030227 A030228 A030229 this_sequence A030231 A030232 
               A030233
%K A030230 nonn,easy,nice
%O A030230 1,1
%A A030230 David W. Wilson (davidwwilson(AT)comcast.net)