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.

A323349 Number of positive integer matrices with entries summing to n, with equal row-sums and equal column-sums.

Table of values

n a(n)
0 1
1 1
2 3
3 3
4 6
5 3
6 11
7 3
8 12
9 6
10 13
11 3
12 52
13 3
14 15
15 30
16 57
17 3
18 156
19 3
20 238
21 129
22 19
23 3
24 2221
25 6
26 21
27 415
28 3114
29 3
30 14921
31 3
32 12853
33 1044
34 25
35 6219
36 164743
37 3
38 27
39 2220
40 851476
41 3
42 954088
43 3
44 434106
45 3326714
46 31
47 3
48 24648724
49 6
50 22309800
51 7269
52 2737618
53 3
54 69823653

List of values

[1, 1, 3, 3, 6, 3, 11, 3, 12, 6, 13, 3, 52, 3, 15, 30, 57, 3, 156, 3, 238, 129, 19, 3, 2221, 6, 21, 415, 3114, 3, 14921, 3, 12853, 1044, 25, 6219, 164743, 3, 27, 2220, 851476, 3, 954088, 3, 434106, 3326714, 31, 3, 24648724, 6, 22309800, 7269, 2737618, 3, 69823653]