A293884 - cp's OEIS frontend

A293884 Number of sets of nonempty words with a total of n letters over ternary alphabet containing the third letter such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.

n	a(n)
3	1
4	4
5	16
6	53
7	173
8	532
9	1615
10	4785
11	14066
12	40908
13	118438
14	341253
15	981200
16	2815762
17	8075265
18	23149097
19	66373778
20	190376443
21	546401592
22	1569387414
23	4511532695
24	12980998062
25	37385342522
26	107771434819
27	310967929569
28	898108427259
29	2596180252466
30	7511411442182

[1, 4, 16, 53, 173, 532, 1615, 4785, 14066, 40908, 118438, 341253, 981200, 2815762, 8075265, 23149097, 66373778, 190376443, 546401592, 1569387414, 4511532695, 12980998062, 37385342522, 107771434819, 310967929569, 898108427259, 2596180252466, 7511411442182]

cp's OEIS Frontend

A293884 Number of sets of nonempty words with a total of n letters over ternary alphabet containing the third letter such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.

Table of values

List of values