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 A138490 #3 Aug 24 2012 10:50:01
%S A138490 6,16,1611,3116,162113,13311216,16411223,1322311416,1641142322,
%T A138490 3213243116,1631331422,2214313316,1631331422,2214313316,1631331422,
%U A138490 2214313316,1631331422,2214313316,1631331422,2214313316,1631331422
%N A138490 Say what you see in previous term, from the right, reporting total number for each digit encountered. Initial term is 6.
%C A138490 After a while sequence has period 2 -> {1631331422,2214313316}
%e A138490 To get the term after 162113, we say: one 3's, three 1's, one 2's, one 6's, so 13311216
%Y A138490 Cf. A063850, A022482, A005150, A005151, A006751, A006715, A006711, A022506-A022513, A138484-A138489, A138491-A138493.
%K A138490 easy,nonn,base
%O A138490 0,1
%A A138490 _Paolo P. Lava_ and _Giorgio Balzarotti_, Mar 20 2008