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 A194942 #15 Jul 07 2015 22:24:06
%S A194942 0,0,1,0,1,0,0,1,2,0,1,0,2,0,1,2,0,0,1,2,1,0,1,0,2,0,0,1,0,2,1,0,1,2,
%T A194942 0,1,0,1,2,0,2,0,1,2,1,0,0,1,0,2,0,1,0,1,0,2,1,0,0,1,0,2,1,2,0,1,2,0,
%U A194942 1,0,0,1,2,1,0,1,0,1,0,2,0,1,0,0,1,0,2,1,0,1,0,1,2,1,0,1,2
%N A194942 List of seven normalized ternary Abelian squarefree words.
%C A194942 Lexicographically ordered list of words of increasing length L=1,2,3,... over the alphabet {0,1,2}, without those which contain two adjacent subsequences with the same multiset of symbols, regardless of internal order. Only those words where the symbols appear in order are included; e.g., {0, 1, 0, 2}, but not {0, 2, 0, 1} or {1, 2, 1, 0}.
%C A194942 The row lengths in number of sequences are 1, 1, 2, 3, 5, 5, 3, for total row lengths of 1, 2, 6, 12, 25, 30, 21.
%H A194942 V. Keränen, <a href="http://south.rotol.ramk.fi/keranen/ias2002/NewAbelianSquare-FreeDT0L-LanguagesOver4Letters.nb">New Abelian Square-Free DT0L-Languages over 4 Letters</a>
%e A194942 The rows are:
%e A194942 {{0}},
%e A194942 {{0, 1}},
%e A194942 {{0, 1, 0}, {0, 1, 2}},
%e A194942 {{0, 1, 0, 2}, {0, 1, 2, 0}, {0, 1, 2, 1}},
%e A194942 {{0, 1, 0, 2, 0}, {0, 1, 0, 2, 1}, {0, 1, 2, 0, 1}, {0, 1, 2, 0, 2}, {0, 1, 2, 1, 0}},
%e A194942 {{0, 1, 0, 2, 0, 1}, {0, 1, 0, 2, 1, 0}, {0, 1, 0, 2, 1, 2}, {0, 1, 2, 0, 1, 0}, {0, 1, 2, 1, 0, 1}},
%e A194942 {{0, 1, 0, 2, 0, 1, 0}, {0, 1, 0, 2, 1, 0, 1}, {0, 1, 2, 1, 0, 1, 2}}
%Y A194942 Cf. A194923 (includes non-normalized sequences).
%K A194942 nonn,fini,full,tabf
%O A194942 1,9
%A A194942 _Franklin T. Adams-Watters_, Sep 05 2011