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.

A199673 Number of ways to form k labeled groups, each with a distinct leader, using n people. Triangle T(n,k) = n!*k^(n-k)/(n-k)! for 1 <= k <= n.

Table of values

n a(n)
1 1
2 2
3 2
4 3
5 12
6 6
7 4
8 48
9 72
10 24
11 5
12 160
13 540
14 480
15 120
16 6
17 480
18 3240
19 5760
20 3600
21 720
22 7
23 1344
24 17010
25 53760
26 63000
27 30240
28 5040
29 8
30 3584
31 81648
32 430080
33 840000
34 725760
35 282240
36 40320
37 9
38 9216
39 367416
40 3096576
41 9450000
42 13063680
43 8890560
44 2903040
45 362880

List of values

[1, 2, 2, 3, 12, 6, 4, 48, 72, 24, 5, 160, 540, 480, 120, 6, 480, 3240, 5760, 3600, 720, 7, 1344, 17010, 53760, 63000, 30240, 5040, 8, 3584, 81648, 430080, 840000, 725760, 282240, 40320, 9, 9216, 367416, 3096576, 9450000, 13063680, 8890560, 2903040, 362880]