cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A293733 Number of multisets of nonempty words with a total of n letters over ternary alphabet 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

n a(n)
0 1
1 1
2 3
3 7
4 19
5 48
6 131
7 348
8 954
9 2607
10 7212
11 19995
12 55816
13 156246
14 439267
15 1238397
16 3502004
17 9927260
18 28208628
19 80322048
20 229161413
21 654966245
22 1875074366
23 5376298225
24 15437286706
25 44385247519
26 127776425727
27 368276055467
28 1062618076382
29 3069264747076

List of values

[1, 1, 3, 7, 19, 48, 131, 348, 954, 2607, 7212, 19995, 55816, 156246, 439267, 1238397, 3502004, 9927260, 28208628, 80322048, 229161413, 654966245, 1875074366, 5376298225, 15437286706, 44385247519, 127776425727, 368276055467, 1062618076382, 3069264747076]