%I A087794
%S A087794 1,2,4,3,4,6,8,5,9,6,10,7,12,8,12,9,16,14,15,16,10,11,18,18,12,20,13,21,
%T A087794 14,20,24,22,15,24,16,24,27,17,28,25,18,26,28,32,19,30,20,30,30,21,33,
%U A087794 22,32,36,23,36,34,24,36,36,35,25,38,26,40,39,27,40,40,28,42,44,29
%N A087794 Products of prime-indices of factors of semiprimes.
%C A087794 a(n) = A049084(A084126(n))*A049084(A084127(n)) = A003963(A001358(n)).
%e A087794 A001358(20)=57=3*19=A000040(2)*A000040(8), therefore a(20)=2*8=16.
%Y A087794 Sequence in context: A083172 A104148 A089169 this_sequence A050514 A133702 
               A080001
%Y A087794 Adjacent sequences: A087791 A087792 A087793 this_sequence A087795 A087796 
               A087797
%K A087794 nonn
%O A087794 1,2
%A A087794 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 09 2003