A213292 - cp's OEIS frontend

A213292 Number of n-length words w over 4-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	4
2	16
3	46
4	118
5	276
6	712
7	1805
8	4895
9	13280
10	37993
11	109386
12	328219
13	992413
14	3101399
15	9764376
16	31580645
17	102797899
18	342075208
19	1144125506
20	3896297053
21	13319243655
22	46206520968
23	160729837020
24	565901313043
25	1996113320841
26	7111795754941
27	25369213794266

[1, 4, 16, 46, 118, 276, 712, 1805, 4895, 13280, 37993, 109386, 328219, 992413, 3101399, 9764376, 31580645, 102797899, 342075208, 1144125506, 3896297053, 13319243655, 46206520968, 160729837020, 565901313043, 1996113320841, 7111795754941, 25369213794266]

cp's OEIS Frontend

A213292 Number of n-length words w over 4-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