Search: id:A033992
Results 1-1 of 1 results found.

%I A033992
%S A033992 30,42,60,66,70,78,84,90,102,105,110,114,120,126,130,132,138,140,150,
%T A033992 154,156,165,168,170,174,180,182,186,190,195,198,204,220,222,228,230,
%U A033992 231,234,238,240,246,252,255,258,260,264,266,270,273,276,280,282,285
%N A033992 Numbers that are divisible by exactly three different primes.
%C A033992 Below 210, A000977 and this sequence are identical.
%H A033992 T. D. Noe, <a href="b033992.txt">Table of n, a(n) for n=1..1000</a>
%F A033992 omega(a(n)) = A001221(a(n)) = 3. - Jonathan Vos Post (jvospost3(AT)gmail.com), 
               Sep 20 2005
%e A033992 220=2*2*5*11 is here but 210 is not; compare A000977.
%Y A033992 Cf. A000977, A007774, A000961, A033993, A051270.
%Y A033992 Cf. A112802.
%Y A033992 Sequence in context: A090800 A114816 A000977 this_sequence A091454 A136152 
               A090815
%Y A033992 Adjacent sequences: A033989 A033990 A033991 this_sequence A033993 A033994 
               A033995
%K A033992 nonn
%O A033992 1,1
%A A033992 Labos E. (labos(AT)ana.sote.hu)

Search completed in 0.002 seconds