A321841 - cp's OEIS frontend

A321841 Number of words w of length n such that each letter of the quinary 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)
5	120
6	360
7	1470
8	4872
9	17649
10	60465
11	218360
12	779649
13	2878543
14	10662640
15	40402105
16	154308568
17	599106195
18	2346709225
19	9308176915
20	37232621263
21	150428771629
22	612404221280
23	2513790671891
24	10388482748377
25	43231607141305
26	180987402799559
27	762252080995334

[120, 360, 1470, 4872, 17649, 60465, 218360, 779649, 2878543, 10662640, 40402105, 154308568, 599106195, 2346709225, 9308176915, 37232621263, 150428771629, 612404221280, 2513790671891, 10388482748377, 43231607141305, 180987402799559, 762252080995334]

cp's OEIS Frontend

A321841 Number of words w of length n such that each letter of the quinary 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