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.

A328156 Number of set partitions of [2n] with distinct block sizes and one of the block sizes is n.

Table of values

n a(n)
0 1
1 0
2 0
3 60
4 280
5 3780
6 74844
7 576576
8 6949800
9 110416020
10 3319141540
11 31333878576
12 545777101324
13 8349081650000
14 196469122903200
15 8108831645948160
16 99934219113287400
17 1961077012271694900
18 39215221761564594900
19 860948656518718429200
20 25274389422461123124180

List of values

[1, 0, 0, 60, 280, 3780, 74844, 576576, 6949800, 110416020, 3319141540, 31333878576, 545777101324, 8349081650000, 196469122903200, 8108831645948160, 99934219113287400, 1961077012271694900, 39215221761564594900, 860948656518718429200, 25274389422461123124180]

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

Content is available under The OEIS End-User License Agreement.