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.

A129506 Number of partitions of a {2n-1}-set into n nonempty subsets.

Table of values

n a(n)
1 1
2 3
3 25
4 350
5 6951
6 179487
7 5715424
8 216627840
9 9528822303
10 477297033785
11 26826851689001
12 1672162773483930
13 114485073343744260
14 8541149231801585700
15 689692892575539953400
16 59932861644880019603520
17 5576731051262006158950735
18 553234633385550257808059085

List of values

[1, 3, 25, 350, 6951, 179487, 5715424, 216627840, 9528822303, 477297033785, 26826851689001, 1672162773483930, 114485073343744260, 8541149231801585700, 689692892575539953400, 59932861644880019603520, 5576731051262006158950735, 553234633385550257808059085]

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

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