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.

A246106 Number A(n,k) of inequivalent n X n matrices with entries from [k], where equivalence means permutations of rows or columns; square array A(n,k), n>=0, k>=0, read by antidiagonals.

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 1
5 0
6 1
7 2
8 1
9 0
10 1
11 3
12 7
13 1
14 0
15 1
16 4
17 27
18 36
19 1
20 0
21 1
22 5
23 76
24 738
25 317
26 1
27 0
28 1
29 6
30 175
31 8240
32 90492
33 5624
34 1
35 0
36 1
37 7
38 351
39 57675
40 7880456
41 64796982
42 251610
43 1
44 0
45 1
46 8
47 637
48 289716
49 270656150
50 79846389608
51 302752867740
52 33642660
53 1
54 0

List of values

[1, 1, 0, 1, 1, 0, 1, 2, 1, 0, 1, 3, 7, 1, 0, 1, 4, 27, 36, 1, 0, 1, 5, 76, 738, 317, 1, 0, 1, 6, 175, 8240, 90492, 5624, 1, 0, 1, 7, 351, 57675, 7880456, 64796982, 251610, 1, 0, 1, 8, 637, 289716, 270656150, 79846389608, 302752867740, 33642660, 1, 0]