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 A033864 #5 Mar 30 2012 18:35:33 %S A033864 1,11,233,233,2233,1336,1446,2477,2477,12888,12888,12888,44677,115588, %T A033864 67788,67788,67788,67788,2334455,2255666,2255666,2444477,2444477, %U A033864 1122688,1122688,1125555,1125555,1125555,11337888,222224499,22244488 %N A033864 Sorted number reached from A033863(n) by Sort-then-add. %K A033864 nonn,base %O A033864 0,2 %A A033864 _David W. Wilson_