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 A353111 #14 Apr 26 2022 04:49:47
%S A353111 1,210,102220,12221001,2202111220,1020020120010,112101212202101,
%T A353111 20002221022010100,2112211110001000200,1001100202012200011001,
%U A353111 10221012122122021102212210,120212211002121222001110211020,2100201122222221220212010020220201
%N A353111 Base-3 representation of A000422(n).
%F A353111 a(n) = A007089(A000422(n)).
%o A353111 (Ruby)
%o A353111 def A(k, n)
%o A353111 (1..n).map{|i| (1..i).to_a.reverse.join.to_i.to_s(k).to_i}
%o A353111 end
%o A353111 p A(3, 20)
%Y A353111 Cf. A000422, A353110, A353112, A353113, A353114, A353115, A353116, A353117.
%Y A353111 Cf. A007089, A097580.
%K A353111 nonn,base
%O A353111 1,2
%A A353111 _Seiichi Manyama_, Apr 24 2022