%I #3 Nov 16 2017 15:52:24
%S 4,6,9,22,33
%N Semiprimes (A001358) which are not the sum of two semiprimes.
%C Apparently the list is complete.
%Y Cf. A001358.
%K fini,full,nonn
%O 1,1
%A _Zak Seidov_, Mar 11 2008
