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 A138484 #3 Aug 24 2012 10:50:01
%S A138484 0,10,1011,3110,102113,13311210,10411223,1322311410,1041142322,
%T A138484 3213243110,1031331422,2214313310,1031331422,2214313310,1031331422,
%U A138484 2214313310,1031331422,2214313310,1031331422,2214313310,1031331422
%N A138484 Say what you see in previous term, from the right, reporting total number for each digit encountered. Initial term is 0.
%C A138484 After a while sequence has period 2 -> {1031331422,2214313310}
%e A138484 To get the term after 102113, we say: one 3's, three 1's, one 2's, one 0's, so 13311210.
%Y A138484 Cf. A063850, A022482, A005150, A005151, A006751, A006715, A006711, A022506-A022513, A138485-A138493.
%K A138484 easy,nonn,base
%O A138484 0,2
%A A138484 _Paolo P. Lava_ and _Giorgio Balzarotti_, Mar 20 2008