A240612 - cp's OEIS frontend

A240612 Number of n-length words w over a 6-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	165
7	650
8	2742
9	12195
10	56388
11	267382
12	1291017
13	6304776
14	31043333
15	153739806
16	764663187
17	3817811679
18	19117378411
19	96034890298
20	483633087406
21	2442935438558
22	12369440072730
23	62816259353597
24	319763315261222
25	1632483727134416
26	8354058837330795

[1, 1, 2, 5, 14, 46, 165, 650, 2742, 12195, 56388, 267382, 1291017, 6304776, 31043333, 153739806, 764663187, 3817811679, 19117378411, 96034890298, 483633087406, 2442935438558, 12369440072730, 62816259353597, 319763315261222, 1632483727134416, 8354058837330795]

cp's OEIS Frontend

A240612 Number of n-length words w over a 6-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