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 A038469 #9 Jul 13 2022 05:59:30
%S A038469 1093,2551,3037,3199,3253,3271,3277,3279,6925,7411,7573,7627,7645,
%T A038469 7651,7653,8869,9031,9085,9103,9109,9111,9517,9571,9589,9595,9597,
%U A038469 9733,9751,9757,9759,9805,9811,9813,9829,9831,9837,20047,20533,20695,20749,20767,20773,20775
%N A038469 Sums of 7 distinct powers of 3.
%H A038469 Amiram Eldar, <a href="/A038469/b038469.txt">Table of n, a(n) for n = 1..10000</a>
%t A038469 Sort[Plus @@@ Subsets[3^Range[0, 8], {7}]] (* _Amiram Eldar_, Jul 13 2022 *)
%Y A038469 Base 3 interpretation of A038449.
%Y A038469 Cf. A000244, A038464, A038465, A038466, A038467, A038468.
%K A038469 nonn,easy
%O A038469 1,1
%A A038469 _Olivier Gérard_
%E A038469 Offset corrected by _Amiram Eldar_, Jul 13 2022