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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.

A324523 Number of colored set partitions of [2n] where elements of subsets have distinct colors and exactly n colors are used.

Table of values

n a(n)
0 1
1 1
2 74
3 31770
4 42687960
5 134092967400
6 831428629796160
7 9095459029214397840
8 162061482211484681105280
9 4429476877635332233622271360
10 177245727799376537644530489120000
11 10002691163041098923871227379695673600
12 772102922309973700712743861257373871078400

List of values

[1, 1, 74, 31770, 42687960, 134092967400, 831428629796160, 9095459029214397840, 162061482211484681105280, 4429476877635332233622271360, 177245727799376537644530489120000, 10002691163041098923871227379695673600, 772102922309973700712743861257373871078400]

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

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