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 A226830 #3 Jun 19 2013 02:28:50
%S A226830 2,7,10,15,37,45,82,87,117,217,225,297,730,735,765,945,1297,1305,1377,
%T A226830 2025,6562,6567,6597,6777,7777,7785,7857,8505,14337,46657,46665,46737,
%U A226830 47385,53217,59050,59055,59085,59265,60345,66825,105705,279937,279945,280017
%N A226830 Numbers of the form 6^j + 9^k, for j and k >= 0.
%H A226830 T. D. Noe, <a href="/A226830/b226830.txt">Table of n, a(n) for n = 1..10000</a>
%t A226830 a = 6; b = 9; mx = 300000; Union[Flatten[Table[a^n + b^m, {m, 0, Log[b, mx]}, {n, 0, Log[a, mx - b^m]}]]]
%Y A226830 Cf. A004050 (2^j + 3^k), A226806-A226832 (cases to 8^j + 9^k).
%K A226830 nonn
%O A226830 1,1
%A A226830 _T. D. Noe_, Jun 19 2013