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 A239296 #23 Oct 02 2014 07:52:25
%S A239296 1,1,4,24,186,1745,19090,237594,3305610,50736447,850285888,
%T A239296 15430858102,301188960996,6286897888336,139661748755464,
%U A239296 3288136274970026,81747690289414282,2139280904017185007,58762203796595526676,1689933802493155288876,50768897450201657287066
%N A239296 Words of length n over the alphabet {0,...,n-1} that are 112-avoiding.
%H A239296 Hiroaki Yamanouchi, <a href="/A239296/b239296.txt">Table of n, a(n) for n = 0..26</a>
%e A239296 For a(3) all words of length 3 over {0,1,2} except: 001, 002, 112.
%Y A239296 Cf. A000312, A239295.
%K A239296 nonn
%O A239296 0,3
%A A239296 _Chad Brewbaker_, Mar 14 2014
%E A239296 a(8)-a(11) from _Giovanni Resta_, Mar 14 2014
%E A239296 a(12)-a(18) from _Alois P. Heinz_, Mar 15 2014
%E A239296 a(19)-a(20) from _Hiroaki Yamanouchi_, Oct 02 2014