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%I #4 Apr 10 2014 12:08:29
%S 1,1,2,5,14,46,165,651,2771,12638,61397,315507,1708420,9693168,
%T 57360909,352099643,2229930365,14494768448,96229497555,649761232948,
%U 4446218110646,30745322129155,214353097904732,1504152530715607,10609439744527674,75146372454242527
%N Number of n-length words w over a 9-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 Column k=9 of A240608.
%K nonn
%O 0,3
%A _Alois P. Heinz_, Apr 09 2014
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