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 A023097 #5 Mar 30 2012 18:35:18 %S A023097 245,2985,525,1208,142857,20,2970,21,3419,69034,11220,24,459,9720, %T A023097 25935,55,13671,88,52900,630,21775,535483,22113,35,2175,35520,1240, %U A023097 43520,102795,204,1505,171,253783,2660,112008,140,6027,89208,96105,253,547515 %N A023097 a(n) is least k such that k and 5k are anagrams in base n (written in base 10). %K A023097 nonn,base %O A023097 6,1 %A A023097 _David W. Wilson_