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.

A227545 The number of idempotents in the Brauer monoid on [1..n].

Table of values

n a(n)
0 1
1 1
2 2
3 10
4 40
5 296
6 1936
7 17872
8 164480
9 1820800
10 21442816
11 279255296
12 3967316992
13 59837670400
14 988024924160
15 17009993230336
16 318566665977856
17 6177885274406912
18 129053377688043520
19 2786107670662021120
20 64136976817284448256
21 1525720008470138454016
22 38350749144768938770432

List of values

[1, 1, 2, 10, 40, 296, 1936, 17872, 164480, 1820800, 21442816, 279255296, 3967316992, 59837670400, 988024924160, 17009993230336, 318566665977856, 6177885274406912, 129053377688043520, 2786107670662021120, 64136976817284448256, 1525720008470138454016, 38350749144768938770432]

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

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