A213866 Number of words w where each letter of the n-ary alphabet occurs 6 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, 174, 188196, 586368681, 3745777177366, 40684710729862072, 668821362774214965294, 15388200323143520006870562, 468682891926540940991787213006, 18131599140232990157442722880124741, 863168115684925396146477660939182979547

Offset

0,3

Links

Table of n, a(n) for n=0..11.

Example

a(0) = 1: the empty word.
a(1) = 1: aaaaaa.
a(2) = 174: aaaaaabbbbbb, aaaaababbbbb, ..., baabababaabb, baababababab.

Crossrefs

Row n=6 of A213275.

Sequence in context: A053173 A185525 A224433 * A252717 A187425 A186218

Adjacent sequences: A213863 A213864 A213865 * A213867 A213868 A213869

Keyword

nonn

Author

Alois P. Heinz, Jun 23 2012

Status

approved