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 A023063 #19 Aug 07 2025 03:01:41
%S A023063 1034,10034,10340,10344,10434,100034,100340,100344,100434,102243,
%T A023063 102342,102423,103400,103440,103444,104340,104344,104434,1000034,
%U A023063 1000340,1000344,1000434,1002243,1002342,1002423,1003400,1003440,1003444,1004340
%N A023063 Positive numbers k such that k and 4*k are anagrams in base 5 (written in base 5).
%H A023063 Amiram Eldar, <a href="/A023063/b023063.txt">Table of n, a(n) for n = 1..10000</a>
%t A023063 FromDigits[IntegerDigits[#, 5]] & /@ Select[Range[30000], SameQ @@ Sort /@ IntegerDigits[{#, 4*#}, 5] &] (* _Amiram Eldar_, Aug 06 2025 *)
%Y A023063 Cf. A007091.
%K A023063 nonn,base
%O A023063 1,1
%A A023063 _David W. Wilson_