%I #2 Mar 30 2012 19:00:22
%S 2,3,5,6,7,8,10,11,12,13,14,15,16,17,18,19,21,22,23,24,25,26,27,28,29,
%T 30,31,32,33,34,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,
%U 54,55
%N a(n) = numbers m such that are not the product of k-th noncomposite number and k for any k >= 1.
%C Complement of set {A(noncomposite number(n)*n)} = {A164931(n)} = {A(A008578(n)*A000027(n))}.
%K nonn
%O 1,1
%A _Jaroslav Krizek_, Dec 11 2009