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%I #33 Nov 27 2014 03:36:09
%S 1,2,3,4,9,10,11,17,27,28,30,35,36,54,65,67,73,81,82,89,91,108,126,
%T 128,134,145,152,206,217,219,225,243,244,251,270,297,307,344,346,352,
%U 368,370,424,459,513,515,521,539,586,593,729,730,732,737,738,755,756
%N Numbers of the form 3^x + y^3 with x, y >= 0.
%C No terms are congruent to 5 or 7 (mod 8): subsequence of A047420.
%H Vincenzo Librandi, <a href="/A250483/b250483.txt">Table of n, a(n) for n = 1..2500</a>
%e 17 is in this sequence because 3^2+2^3=17.
%e 91 is in this sequence because 3^3+4^3=91.
%t nn=15; Union[Select[Flatten[Table[3^x + y^3, {x, 0, nn}, {y, 0, nn}]], #<=nn^3 &]]
%Y Cf. A047420.
%Y Cf. similar sequences listed in A250482.
%K nonn
%O 1,2
%A _Vincenzo Librandi_, Nov 25 2014
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