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 A240613 #4 Apr 10 2014 12:29:21
%S A240613 1,1,2,5,14,46,165,651,2770,12601,60686,305658,1595454,8547278,
%T A240613 46685641,258530476,1446098060,8148181066,46165702543,262699285827,
%U A240613 1500141404881,8592741193076,49353003881425,284185414898313,1640366631269049,9490895165369217
%N A240613 Number of n-length words w over a 7-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 A240613 Column k=7 of A240608.
%K A240613 nonn
%O A240613 0,3
%A A240613 _Alois P. Heinz_, Apr 09 2014