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 A138492 #3 Aug 24 2012 10:50:01
%S A138492 8,18,1811,3118,182113,13311218,18411223,1322311418,1841142322,
%T A138492 3213243118,1831331422,2214313318,1831331422,2214313318,1831331422,
%U A138492 2214313318,1831331422,2214313318,1831331422,2214313318,1831331422
%N A138492 Say what you see in previous term, from the right, reporting total number for each digit encountered. Initial term is 8.
%C A138492 After a while sequence has period 2 -> {1831331422,2214313318}
%e A138492 To get the term after 182113, we say: one 3's, three 1's, one 2's, one 8's, so 13311218
%Y A138492 Cf. A063850, A022482, A005150, A005151, A006751, A006715, A006711, A022506-A022513, A138484-A138491, A138493.
%K A138492 easy,nonn,base
%O A138492 0,1
%A A138492 _Paolo P. Lava_ and _Giorgio Balzarotti_, Mar 20 2008