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.

A225797 The number of idempotents in the partition monoid on [1..n].

Table of values

n a(n)
1 2
2 12
3 114
4 1512
5 25826
6 541254
7 13479500
8 389855014
9 12870896154
10 478623817564
11 19835696733562
12 908279560428462
13 45625913238986060
14 2499342642591607902
15 148545280714724993650
16 9537237096314268691724

List of values

[2, 12, 114, 1512, 25826, 541254, 13479500, 389855014, 12870896154, 478623817564, 19835696733562, 908279560428462, 45625913238986060, 2499342642591607902, 148545280714724993650, 9537237096314268691724]

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

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