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 A032807 #17 Sep 08 2022 08:44:51
%S A032807 2,3,16,17,23,24,114,115,121,122,163,164,170,171,800,801,807,808,849,
%T A032807 850,856,857,1143,1144,1150,1151,1192,1193,1199,1200,5602,5603,5609,
%U A032807 5610,5651,5652,5658,5659,5945,5946,5952,5953
%N A032807 Numbers whose set of base-7 digits is {2,3}.
%H A032807 Vincenzo Librandi, <a href="/A032807/b032807.txt">Table of n, a(n) for n = 1..1000</a>
%H A032807 <a href="/index/Ar#7-automatic">Index entries for 7-automatic sequences</a>.
%t A032807 Flatten[Table[FromDigits[#,7]&/@Tuples[{2,3},n],{n,5}]] (* _Vincenzo Librandi_, May 27 2012 *)
%o A032807 (Magma) [n: n in [1..8000] | Set(IntegerToSequence(n, 7)) subset {2, 3}]; // _Vincenzo Librandi_, May 27 2012
%K A032807 nonn,base,easy
%O A032807 1,1
%A A032807 _Clark Kimberling_