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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.

A255906 Number of collections of nonempty multisets with a total of n objects having color set {1,...,k} for some k<=n.

Table of values

n a(n)
0 1
1 1
2 4
3 16
4 76
5 400
6 2356
7 15200
8 106644
9 806320
10 6526580
11 56231024
12 513207740
13 4941362512
14 50013751812
15 530481210672
16 5880285873060
17 67954587978448
18 816935340368068
19 10196643652651664
20 131904973822724540
21 1765645473517011568
22 24420203895517396180

List of values

[1, 1, 4, 16, 76, 400, 2356, 15200, 106644, 806320, 6526580, 56231024, 513207740, 4941362512, 50013751812, 530481210672, 5880285873060, 67954587978448, 816935340368068, 10196643652651664, 131904973822724540, 1765645473517011568, 24420203895517396180]

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

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