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 A353104 #16 Apr 26 2022 03:49:23
%S A353104 1,30,1323,103102,3000321,132021000,10231122013,233012011032,
%T A353104 13112330310111,23133313001300332,101331301332300201003,
%U A353104 130010202012003303220320,223313011101131330223313231,1010202010033102302310203002202
%N A353104 Base-4 representation of A007908(n).
%H A353104 Seiichi Manyama, <a href="/A353104/b353104.txt">Table of n, a(n) for n = 1..236</a>
%F A353104 a(n) = A007090(A007908(n)).
%o A353104 (Ruby)
%o A353104 def A(k, n)
%o A353104 (1..n).map{|i| (1..i).to_a.join.to_i.to_s(k).to_i}
%o A353104 end
%o A353104 p A(4, 20)
%Y A353104 Cf. A007908, A050926, A097580, A097582, A097583, A353105, A353106, A353107.
%Y A353104 Cf. A007090.
%K A353104 nonn,base
%O A353104 1,2
%A A353104 _Seiichi Manyama_, Apr 23 2022