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 A226812 #6 May 02 2023 06:21:38
%S A226812 2,4,7,9,10,15,28,33,37,39,45,63,82,87,117,217,219,225,243,244,249,
%T A226812 279,297,459,730,735,765,945,1297,1299,1305,1323,1377,1539,2025,2188,
%U A226812 2193,2223,2403,3483,6562,6567,6597,6777,7777,7779,7785,7803,7857,8019,8505
%N A226812 Numbers of the form 3^j + 6^k, for j and k >= 0.
%C A226812 Conjecture: Any positive integer not among 1, 3, 5, 6, 8, 12, 27 can be written as a sum of distinct terms of the current sequence with no summand dividing another. - _Zhi-Wei Sun_, May 01 2023
%H A226812 T. D. Noe, <a href="/A226812/b226812.txt">Table of n, a(n) for n = 1..10000</a>
%t A226812 a = 3; b = 6; mx = 9000; Union[Flatten[Table[a^n + b^m, {m, 0, Log[b, mx]}, {n, 0, Log[a, mx - b^m]}]]]
%Y A226812 Cf. A004050 (2^j + 3^k), A226806-A226832 (cases to 8^j + 9^k).
%K A226812 nonn
%O A226812 1,1
%A A226812 _T. D. Noe_, Jun 19 2013