%I A080943
%S A080943 3,5,6,7,9,10,11,12,13,14,17,18,19,20,21,22,23,24,25,26,28,29,31,33,34,
%T A080943 35,36,37,38,40,41,42,43,44,46,47,48,49,50,52,53,55,56,57,58,59,61,62,
%U A080943 65,66,67,68,69,70,71,72,73,74,76,77,79,80,81,82,83,84,86,88,89,91,92
%N A080943 Numbers having exactly two divisors that are also suffices in binary 
               representation.
%C A080943 A080942(a(n))=2, the two divisors are n and 1 for odd numbers and 2 for 
               even numbers.
%Y A080943 Cf. A080945, A080944, A007088, A080940, A080941.
%Y A080943 Sequence in context: A138591 A136492 A062506 this_sequence A052294 A116883 
               A047984
%Y A080943 Adjacent sequences: A080940 A080941 A080942 this_sequence A080944 A080945 
               A080946
%K A080943 nonn,base
%O A080943 1,1
%A A080943 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 25 2003