A240611 - cp's OEIS frontend

A240611 Number of n-length words w over a 5-ary alphabet such that w is empty or a prefix z concatenated with letter a_i and i=1 or 0 < #(z,a_{i-1}) >= #(z,a_i), where #(z,a_i) counts the occurrences of the i-th letter in z.

n	a(n)
0	1
1	1
2	2
3	5
4	14
5	46
6	164
7	629
8	2511
9	10284
10	42765
11	179411
12	757518
13	3212026
14	13672821
15	58390509
16	250183486
17	1075280768
18	4636221163
19	20051763960
20	86995226538
21	378588153837
22	1652550862097
23	7234850625649
24	31766225617819
25	139871594177849
26	617573798910950

[1, 1, 2, 5, 14, 46, 164, 629, 2511, 10284, 42765, 179411, 757518, 3212026, 13672821, 58390509, 250183486, 1075280768, 4636221163, 20051763960, 86995226538, 378588153837, 1652550862097, 7234850625649, 31766225617819, 139871594177849, 617573798910950]

cp's OEIS Frontend

A240611 Number of n-length words w over a 5-ary alphabet such that w is empty or a prefix z concatenated with letter a_i and i=1 or 0 < #(z,a_{i-1}) >= #(z,a_i), where #(z,a_i) counts the occurrences of the i-th letter in z.

Table of values

List of values