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 A353112 #13 Apr 26 2022 04:50:05
%S A353112 1,111,11001,1003201,31100301,2133233301,131030232301,11032113332301,
%T A353112 322313212202301,22032322210302301,100022230001210102301,
%U A353112 123202121121121130102301,232213121102313132210102301,1032130122202213111001210102301
%N A353112 Base-4 representation of A000422(n).
%F A353112 a(n) = A007090(A000422(n)).
%o A353112 (Ruby)
%o A353112 def A(k, n)
%o A353112 (1..n).map{|i| (1..i).to_a.reverse.join.to_i.to_s(k).to_i}
%o A353112 end
%o A353112 p A(4, 20)
%Y A353112 Cf. A000422, A353110, A353111, A353113, A353114, A353115, A353116, A353117.
%Y A353112 Cf. A007090, A353104.
%K A353112 nonn,base
%O A353112 1,2
%A A353112 _Seiichi Manyama_, Apr 24 2022