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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.

A320213 Number of multisets of nonempty words with a total of n letters over ternary alphabet such that all letters occur at least once in the multiset.

Table of values

n a(n)
3 13
4 114
5 672
6 3334
7 15030
8 63978
9 261880
10 1043658
11 4076856
12 15688108
13 59650623
14 224625639
15 839026657
16 3112293273
17 11474908920
18 42080197859
19 153566261268
20 557943898644
21 2018901838589
22 7277784002970
23 26142839723154
24 93599166705077
25 334072869753357

List of values

[13, 114, 672, 3334, 15030, 63978, 261880, 1043658, 4076856, 15688108, 59650623, 224625639, 839026657, 3112293273, 11474908920, 42080197859, 153566261268, 557943898644, 2018901838589, 7277784002970, 26142839723154, 93599166705077, 334072869753357]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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