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 A023060 #18 Aug 07 2025 03:00:20
%S A023060 1023,10023,10113,10230,10233,10323,100023,100113,100230,100233,
%T A023060 100323,101130,101133,101232,102300,102330,102333,103230,103233,
%U A023060 103323,1000023,1000113,1000230,1000233,1000323,1001130,1001133,1001232,1002300,1002330
%N A023060 Positive numbers k such that k and 3*k are anagrams in base 4 (written in base 4).
%H A023060 Amiram Eldar, <a href="/A023060/b023060.txt">Table of n, a(n) for n = 1..10000</a>
%t A023060 FromDigits[IntegerDigits[#, 4]] & /@ Select[Range[10000], SameQ @@ Sort /@ IntegerDigits[{#, 3*#}, 4] &] (* _Amiram Eldar_, Aug 06 2025 *)
%Y A023060 Cf. A007090.
%K A023060 nonn,base
%O A023060 1,1
%A A023060 _David W. Wilson_