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A293739
Number of multisets of nonempty words with a total of n letters over nonary alphabet such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.
5
1, 1, 3, 7, 20, 54, 164, 500, 1630, 5472, 19256, 70121, 265723, 1041184, 4225484, 17689505, 76392933, 339283021, 1548592471, 7246210567, 34725853445, 170096822940, 850715642495, 4337263437693, 22519434992230, 118916581795167, 638088881489144, 3475474084479428
OFFSET
0,3
COMMENTS
This sequence differs from A293110 first at n=10.
LINKS
FORMULA
G.f.: Product_{j>=1} 1/(1-x^j)^A212915(j).
a(n) ~ c * 9^n / n^18, where c = 978644175524508179.918397627321774... - Vaclav Kotesovec, Dec 19 2020
CROSSREFS
Column k=9 of A293108.
Sequence in context: A293736 A293737 A293738 * A293740 A293110 A322204
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Oct 15 2017
STATUS
approved