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.

A306641 A(n,k) = Sum_{j=0..n} (k*n)!/(j! * (n-j)!)^k, square array A(n,k) read by antidiagonals, for n >= 0, k >= 0.

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 2
5 3
6 1
7 4
8 4
9 4
10 1
11 12
12 36
13 8
14 5
15 1
16 48
17 900
18 400
19 16
20 6
21 1
22 240
23 45360
24 94080
25 4900
26 32
27 7
28 1
29 1440
30 3855600
31 60614400
32 11988900
33 63504
34 64
35 8
36 1
37 10080
38 493970400
39 82065984000
40 114144030000
41 1704214512
42 853776
43 128
44 9

List of values

[1, 1, 2, 1, 2, 3, 1, 4, 4, 4, 1, 12, 36, 8, 5, 1, 48, 900, 400, 16, 6, 1, 240, 45360, 94080, 4900, 32, 7, 1, 1440, 3855600, 60614400, 11988900, 63504, 64, 8, 1, 10080, 493970400, 82065984000, 114144030000, 1704214512, 853776, 128, 9]