This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A226790 #4 Jun 19 2013 13:09:50
%S A226790 1,2,3,4,5,7,13,14,16,17,26,41,43,53,63,64,67,76,103,122,124,134,184,
%T A226790 313,314,317,326,353,365,367,377,427,434,677,1094,1096,1106,1156,1406,
%U A226790 1563,1564,1567,1576,1603,1684,1927,2656,3281,3283,3293,3343,3593
%N A226790 Numbers of the form (3^j + 5^k)/2, for j and k >= 0.
%t A226790 a = 3; b = 5; mx = 8000; Union[Flatten[Table[a^n + b^m, {m, 0, Log[b, mx]}, {n, 0, Log[a, mx - b^m]}]]]/2
%Y A226790 Cf. A226809 (3^j + 5^k).
%K A226790 nonn
%O A226790 1,2
%A A226790 _T. D. Noe_, Jun 19 2013