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.

A032265 Number of ways to partition n labeled elements into pie slices of at least 2 elements allowing the pie to be turned over.

Table of values

n a(n)
0 1
1 0
2 1
3 1
4 4
5 11
6 41
7 162
8 925
9 5945
10 47017
11 402788
12 3895937
13 40556595
14 461544253
15 5625446270
16 73716523405
17 1028179882589
18 15257484239777
19 239529471989352
20 3971376169852777
21 69288230115817655
22 1269563315949912469
23 24366794306903776610
24 488969030312192567573

List of values

[1, 0, 1, 1, 4, 11, 41, 162, 925, 5945, 47017, 402788, 3895937, 40556595, 461544253, 5625446270, 73716523405, 1028179882589, 15257484239777, 239529471989352, 3971376169852777, 69288230115817655, 1269563315949912469, 24366794306903776610, 488969030312192567573]

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

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