%I A156592
%S A156592 10,21,55,253,1081,1711,3403,5671,13861,15931,25651,34453,60031,64261,
%T A156592 73153,108811,114481,126253,158203,171991,258121,351541,371953,392941,
%U A156592 482653,518671,703891,822403,853471,869221,933661,1034641,1104841
%N A156592 Product p*q of two primes with q = 2*p + 1.
%C A156592 a(n) = A005384(n)*A005385(n);
%C A156592 subsequence of A068443.
%Y A156592 Sequence in context: A042309 A048697 A090076 this_sequence A045973 A095679 
               A095192
%Y A156592 Adjacent sequences: A156589 A156590 A156591 this_sequence A156593 A156594 
               A156595
%K A156592 nonn
%O A156592 1,1
%A A156592 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 10 2009