%I #13 Jan 08 2013 14:54:32
%S 1,2,4,5,6,7,8,9,11,12,13,14,15,16,18,19,20,21,22,23,25,26,27,28,30,
%T 31,32,33,34,35,37,38,39,40,41,42,44,45,46,47,48,49,50,51,52,53,54,56,
%U 57,58,59,60,61,63,64,65,67,68,69,70,71,72,74,75,76,77,78,79,82,83,84
%N Positive integers that are not the sum of exactly three positive cubes.
%C A025456(a(n)) = 0. [From _Reinhard Zumkeller_, Apr 23 2009]
%H T. D. Noe, <a href="/A057904/b057904.txt">Table of n, a(n) for n=1..1000</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/CubicNumber.html">Cubic Number.</a>
%t Select[Range[100], Count[ PowersRepresentations[#, 3, 3], pr_List /; FreeQ[pr, 0]] == 0 &] (* _Jean-François Alcover_, Oct 31 2012 *)
%Y Cf. A003072 (Complement)
%K nonn
%O 1,2
%A _Eric W. Weisstein_