%I A005236 M0501
%S A005236 2,3,4,5,6,8,9,10,12,14,17,18,20,24,26,28,30,33,38,42,48,50,54,60,65,
%T A005236 74,82,84,90,98,102,108,110,114,126,129,138,150,164,168,174,180,194,
%U A005236 198,228,234,244,252,258,264,270,290,294,318,348,354,360,384,390,402
%N A005236 Barriers for omega(n).
%D A005236 R. K. Guy, Unsolved Problems in Number Theory, B8.
%D A005236 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%Y A005236 Sequence in context: A094222 A164043 A082415 this_sequence A051250 A143071 
               A143513
%Y A005236 Adjacent sequences: A005233 A005234 A005235 this_sequence A005237 A005238 
               A005239
%K A005236 nonn,nice
%O A005236 1,1
%A A005236 N. J. A. Sloane (njas(AT)research.att.com).
%E A005236 More terms from John Layman (layman(AT)calvin.math.vt.edu).