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 A023101 #5 Mar 30 2012 18:35:18 %S A023101 1089,167580,253638,2499,48893,69034,315,6264,2532609,36,14649,12155, %T A023101 819,869,16974,39,570375,19773,56322,42,1305,43200,2852,59296,1489686, %U A023101 1649,3465,1809,2791613,152,165165,105,5699,6006,322586,256289,4987125,9108 %N A023101 a(n) is least k such that k and 9k are anagrams in base n (written in base 10). %K A023101 nonn,base %O A023101 10,1 %A A023101 _David W. Wilson_