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 A107789 #13 Oct 02 2016 10:21:01
%S A107789 2,2,2,3,3,2,2,2,3,3,2,2,2,3,3,2,3,3,2,3,3,2,2,2,3,3,2,2,2,3,3,2,2,2,
%T A107789 3,3,2,3,3,2,3,3,2,2,2,3,3,2,2,2,3,3,2,2,2,3,3,2,3,3,2,3,3,2,2,2,3,3,
%U A107789 2,3,3,2,3,3,2,2,2,3,3,2,3,3,2,3,3,2,2,2,3,3,2,2,2,3,3,2,2,2,3,3,2,3,3,2,3
%N A107789 Trajectory of 2 under evenly many applications of the morphism 1 -> 2, 2 -> 114, 3 -> 4, 4 -> 233.
%H A107789 <a href="/index/Fi#FIXEDPOINTS">Index entries for sequences that are fixed points of mappings</a>
%F A107789 1->{2}, 2->{1, 1, 4}, 3->{4}, 4->{2, 3, 3}
%t A107789 s[1] = {2}; s[2] = {1, 1, 4}; s[3] = {4}; s[4] = {2, 3, 3}; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]] aa = p[9]
%Y A107789 Cf. A001045, A076662, A214333.
%K A107789 nonn
%O A107789 0,1
%A A107789 _Roger L. Bagula_, Jun 11 2005
%E A107789 Edited by _N. J. A. Sloane_, Jul 26 2012