

A213869


Number of words w where each letter of the nary alphabet occurs 9 times and for every prefix z of w we have #(z,a_i) = 0 or #(z,a_i) >= #(z,a_j) for all j>i and #(z,a_i) counts the occurrences of the ith letter in z.


1



1, 1, 6292, 846167608, 673174876488400, 1785201362960729511070, 11481253272835564584899247346, 146812609193179942830629976945746464, 3264601141014490309682718148875987514642243, 114752550881830601773639529476205016572641397025904
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OFFSET

0,3


LINKS



EXAMPLE

a(0) = 1: the empty word.
a(1) = 1: aaaaaaaaa.
a(2) = 6292: aaaaaaaaabbbbbbbbb, aaaaaaaababbbbbbbb, ..., baababababababaabb, baabababababababab.


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



