A321038 - cp's OEIS frontend

A321038 Number of words of length 3n such that all letters of the octonary alphabet occur at least once and are introduced in ascending order and which can be built by repeatedly inserting triples of identical letters into the initially empty word.

n	a(n)
8	43263
9	7104240
10	694377450
11	52825297536
12	3463906615356
13	206132702914710
14	11470240358743842
15	608199451197152100
16	31120996552066805175
17	1550313320809537870320
18	75665062766954753664390
19	3635046065217379316477688
20	172499755061750807257325550

[43263, 7104240, 694377450, 52825297536, 3463906615356, 206132702914710, 11470240358743842, 608199451197152100, 31120996552066805175, 1550313320809537870320, 75665062766954753664390, 3635046065217379316477688, 172499755061750807257325550]

cp's OEIS Frontend

A321038 Number of words of length 3n such that all letters of the octonary alphabet occur at least once and are introduced in ascending order and which can be built by repeatedly inserting triples of identical letters into the initially empty word.

Table of values

List of values