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.

A060540 Square array read by antidiagonals downwards: T(n,k) = (n*k)!/(k!^n*n!), (n>=1, k>=1), the number of ways of dividing nk labeled items into n unlabeled boxes with k items in each box.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 3
6 1
7 1
8 10
9 15
10 1
11 1
12 35
13 280
14 105
15 1
16 1
17 126
18 5775
19 15400
20 945
21 1
22 1
23 462
24 126126
25 2627625
26 1401400
27 10395
28 1
29 1
30 1716
31 2858856
32 488864376
33 2546168625
34 190590400
35 135135
36 1
37 1
38 6435
39 66512160
40 96197645544
41 5194672859376
42 4509264634875
43 36212176000
44 2027025
45 1

List of values

[1, 1, 1, 1, 3, 1, 1, 10, 15, 1, 1, 35, 280, 105, 1, 1, 126, 5775, 15400, 945, 1, 1, 462, 126126, 2627625, 1401400, 10395, 1, 1, 1716, 2858856, 488864376, 2546168625, 190590400, 135135, 1, 1, 6435, 66512160, 96197645544, 5194672859376, 4509264634875, 36212176000, 2027025, 1]