A321844 - cp's OEIS frontend

A321844 Number of words w of length n such that each letter of the octonary alphabet is used at least once 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.

n	a(n)
8	40320
9	181440
10	1058400
11	4823280
12	23296680
13	103757940
14	478790130
15	2149170345
16	9894491985
17	45282147720
18	211500002835
19	991730832582
20	4733756233145
21	22787184211575
22	111475945291060
23	551049677448403
24	2764601557859302
25	14023910986706605
26	72114359742608090

[40320, 181440, 1058400, 4823280, 23296680, 103757940, 478790130, 2149170345, 9894491985, 45282147720, 211500002835, 991730832582, 4733756233145, 22787184211575, 111475945291060, 551049677448403, 2764601557859302, 14023910986706605, 72114359742608090]

cp's OEIS Frontend

A321844 Number of words w of length n such that each letter of the octonary alphabet is used at least once 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.

Table of values

List of values