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.

A321659 Number of nonnegative integer matrices with sum of entries equal to n and no zero rows or columns, whose nonzero entries are all distinct.

Table of values

n a(n)
0 1
1 1
2 1
3 9
4 9
5 17
6 161
7 169
8 313
9 465
10 5313
11 5465
12 10457
13 15313
14 25009
15 271929
16 286329
17 537953
18 799121
19 1297369
20 1805161
21 20532897
22 21292017
23 40508297
24 59738825
25 97431073
26 135137569
27 209525865
28 2089381929
29 2200470833
30 4135252289
31 6124698121
32 9937836505

List of values

[1, 1, 1, 9, 9, 17, 161, 169, 313, 465, 5313, 5465, 10457, 15313, 25009, 271929, 286329, 537953, 799121, 1297369, 1805161, 20532897, 21292017, 40508297, 59738825, 97431073, 135137569, 209525865, 2089381929, 2200470833, 4135252289, 6124698121, 9937836505]