%I A081330
%S A081330 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,24,25,26,27,28,
%T A081330 29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,48,49,50,51,52,54,
%U A081330 55,56,57,58,59,60,62,63,64,65,66,67,68,70,72,73,74,75,76,78,80,81,82
%N A081330 Numbers that can be written as sum of two 3-smooth numbers.
%C A081330 A081326(a(n))>0; complement of A081329.
%H A081330 Ivars Peterson, <a href="http://www.sciencenews.org/sn_arc99/1_23_99/
               mathland.htm">Medieval Harmony</a>.
%H A081330 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               SmoothNumber.html">Smooth Number</a>.
%Y A081330 Cf. A003586, A081332, A081333, A081327, A081328.
%Y A081330 Sequence in context: A048242 A132264 A004830 this_sequence A080682 A038770 
               A032517
%Y A081330 Adjacent sequences: A081327 A081328 A081329 this_sequence A081331 A081332 
               A081333
%K A081330 nonn
%O A081330 1,1
%A A081330 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 19 2003