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 A226819 #3 Jun 19 2013 02:27:02
%S A226819 2,7,8,13,37,43,50,55,85,217,223,265,344,349,379,559,1297,1303,1345,
%T A226819 1639,2402,2407,2437,2617,3697,7777,7783,7825,8119,10177,16808,16813,
%U A226819 16843,17023,18103,24583,46657,46663,46705,46999,49057,63463,117650,117655,117685
%N A226819 Numbers of the form 6^j + 7^k, for j and k >= 0.
%H A226819 T. D. Noe, <a href="/A226819/b226819.txt">Table of n, a(n) for n = 1..10000</a>
%t A226819 a = 6; b = 7; mx = 120000; Union[Flatten[Table[a^n + b^m, {m, 0, Log[b, mx]}, {n, 0, Log[a, mx - b^m]}]]]
%Y A226819 Cf. A004050 (2^j + 3^k), A226806-A226832 (cases to 8^j + 9^k).
%K A226819 nonn
%O A226819 1,1
%A A226819 _T. D. Noe_, Jun 19 2013