A240613 - cp's OEIS frontend

A240613 Number of n-length words w over a 7-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	651
8	2770
9	12601
10	60686
11	305658
12	1595454
13	8547278
14	46685641
15	258530476
16	1446098060
17	8148181066
18	46165702543
19	262699285827
20	1500141404881
21	8592741193076
22	49353003881425
23	284185414898313
24	1640366631269049
25	9490895165369217

[1, 1, 2, 5, 14, 46, 165, 651, 2770, 12601, 60686, 305658, 1595454, 8547278, 46685641, 258530476, 1446098060, 8148181066, 46165702543, 262699285827, 1500141404881, 8592741193076, 49353003881425, 284185414898313, 1640366631269049, 9490895165369217]

cp's OEIS Frontend

A240613 Number of n-length words w over a 7-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