Search: id:A046339
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%I A046339
%S A046339 8,12,18,20,27,28,30,32,42,44,45,48,50,52,63,66,68,70,72,75,76,78,80,
%T A046339 92,98,99,102,105,108,110,112,114,116,117,120,124,125,128,130,138,147,
%U A046339 148,153,154,162,164,165,168,170,171,172,174,175,176,180,182,186,188
%N A046339 Composite numbers with an odd number of prime factors (counted with multiplicity).
%e A046339 a(1)=8 as 8=2*2*2, that is 8 is a composite integer and having 3 (an 
               odd number) prime factors.
%t A046339 fQ[n_] := Block[{p = Plus @@ Last /@ FactorInteger@n}, OddQ[p] && p > 
               1]; Select[ Range@200, fQ[ # ] &] (from Robert G. Wilson v (rgwv(at)rgwv.com), 
               Jan 04 2006)
%Y A046339 Cf. A046340, A046341, A026424.
%Y A046339 Sequence in context: A036327 A051144 A067537 this_sequence A145784 A014612 
               A046369
%Y A046339 Adjacent sequences: A046336 A046337 A046338 this_sequence A046340 A046341 
               A046342
%K A046339 nonn
%O A046339 1,1
%A A046339 Patrick De Geest (pdg(AT)worldofnumbers.com), Jun 15 1998.

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