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 A240612 #4 Apr 10 2014 12:27:21
%S A240612 1,1,2,5,14,46,165,650,2742,12195,56388,267382,1291017,6304776,
%T A240612 31043333,153739806,764663187,3817811679,19117378411,96034890298,
%U A240612 483633087406,2442935438558,12369440072730,62816259353597,319763315261222,1632483727134416,8354058837330795
%N A240612 Number of n-length words w over a 6-ary alphabet such that w is empty or a prefix z concatenated with letter a_i and i=1 or 0 < #(z,a_{i-1}) >= #(z,a_i), where #(z,a_i) counts the occurrences of the i-th letter in z.
%Y A240612 Column k=6 of A240608.
%K A240612 nonn
%O A240612 0,3
%A A240612 _Alois P. Heinz_, Apr 09 2014