A240616 - cp's OEIS frontend

A240616 Number of n-length words w over a 10-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	2771
9	12638
10	61398
11	315562
12	1709960
13	9723253
14	57831688
15	358445901
16	2306799588
17	15354546420
18	105275618325
19	740481162174
20	5321875886529
21	38940082552276
22	289132258826130
23	2172495189822333
24	16480880960094288
25	125993420982428718

[1, 1, 2, 5, 14, 46, 165, 651, 2771, 12638, 61398, 315562, 1709960, 9723253, 57831688, 358445901, 2306799588, 15354546420, 105275618325, 740481162174, 5321875886529, 38940082552276, 289132258826130, 2172495189822333, 16480880960094288, 125993420982428718]

cp's OEIS Frontend

A240616 Number of n-length words w over a 10-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