%I A072966
%S A072966 0,1,2,3,4,5,6,7,9,11,17,22,33
%N A072966 Numbers which are not the sum of two semiprimes.
%C A072966 Is this sequence finite?
%C A072966 See the graph of sequence A072931 for compelling evidence that 33 is 
               the last term of this sequence. - T. D. Noe (noe(AT)sspectra.com), 
               Apr 11 2007
%e A072966 a(10) = 11 since there is no way to represent 11 as a sum of two semiprimes. 
               13 is not a term since 13 = 4 + 9.
%Y A072966 Cf. A001358.
%Y A072966 Sequence in context: A030151 A131617 A005577 this_sequence A059759 A042952 
               A126327
%Y A072966 Adjacent sequences: A072963 A072964 A072965 this_sequence A072967 A072968 
               A072969
%K A072966 nonn,more
%O A072966 1,3
%A A072966 Lior Manor (lior.manor(AT)gmail.com) Aug 13 2002