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A213875 Number of words w where each letter of the 5-ary 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 i-th letter in z. 2
1, 120, 945, 87595, 19558470, 7236515981, 3745777177366, 2468722942369153, 1953740543358042205, 1785201362960729511070, 1831976833971352074708780, 2068976591723429552651743620, 2532392303303120865350779766160, 3319547855302819899374947284511390 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
EXAMPLE
a(0) = 1: the empty word.
a(1) = 120: abcde, abced, abdce, ..., edbca, edcab, edcba, (all permutations of 5 letters).
a(2) = 945: aabbccddee, aabbccdede, aabbccedde, ..., edcaabbcde, edcababcde, edcbaabcde.
CROSSREFS
Column k=5 of A213275.
Sequence in context: A250519 A250512 A011245 * A092182 A262387 A133119
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jun 23 2012
STATUS
approved

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Last modified May 20 14:08 EDT 2024. Contains 372717 sequences. (Running on oeis4.)