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.

A293797 Number of multisets of nonempty words with a total of n letters over binary alphabet containing the second 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

n a(n)
2 1
3 3
4 10
5 24
6 62
7 140
8 329
9 725
10 1631
11 3548
12 7820
13 16887
14 36767
15 79046
16 170799
17 365883
18 786361
19 1679486
20 3594580
21 7656839
22 16331933
23 34705064
24 73810524
25 156501393
26 332001987
27 702530049
28 1486995062
29 3140712201
30 6634309660
31 13988510961
32 29494808402
33 62091823865

List of values

[1, 3, 10, 24, 62, 140, 329, 725, 1631, 3548, 7820, 16887, 36767, 79046, 170799, 365883, 786361, 1679486, 3594580, 7656839, 16331933, 34705064, 73810524, 156501393, 332001987, 702530049, 1486995062, 3140712201, 6634309660, 13988510961, 29494808402, 62091823865]