A213865 - OEIS

A213865

Number of words w where each letter of the n-ary alphabet occurs 5 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.

1, 1, 56, 13326, 7364321, 7236515981, 10915151070941, 23060727168393236, 64157120593526429971, 224909472938181653263446, 961415357313559098150122721, 4886376056824611061263607492146, 28944590736206982153001156958037271, 196631118571992127875305845382720388771

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OFFSET

0,3

LINKS

Table of n, a(n) for n=0..13.

EXAMPLE

a(0) = 1: the empty word.

a(1) = 1: aaaaa.

a(2) = 56: aaaaabbbbb, aaaababbbb, ..., baababaabb, baabababab.

CROSSREFS

Row n=5 of A213275.

Sequence in context: A059989 A352602 A184125 * A059073 A246632 A289204

Adjacent sequences: A213862 A213863 A213864 * A213866 A213867 A213868

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jun 23 2012

STATUS

approved