

A213871


Number of words w where each letter of the 9ary alphabet occurs n 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, 362880, 34459425, 1035588754375, 256653852463806955, 224909472938181653263446, 468682891926540940991787213006, 1850042480471503379038420801262526759, 11963401430840044468894095677711389363239184, 114752550881830601773639529476205016572641397025904
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OFFSET

0,2


LINKS



EXAMPLE

a(0) = 1: the empty word.
a(1) = 362880: all permutations of 9 letters.


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



