A213297 - cp's OEIS frontend

A213297 Number of n-length words w over 9-ary alphabet such that 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)
0	1
1	9
2	81
3	621
4	4293
5	26061
6	140517
7	676155
8	2990967
9	12602451
10	52359693
11	216954441
12	901911273
13	3778512489
14	16012113225
15	68739345546
16	299377174968
17	1323228682218
18	5939020708851
19	27063683050245
20	125241936884631
21	588324477445971
22	2805460966739493

[1, 9, 81, 621, 4293, 26061, 140517, 676155, 2990967, 12602451, 52359693, 216954441, 901911273, 3778512489, 16012113225, 68739345546, 299377174968, 1323228682218, 5939020708851, 27063683050245, 125241936884631, 588324477445971, 2805460966739493]

cp's OEIS Frontend

A213297 Number of n-length words w over 9-ary alphabet such that 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