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.

A242095 Number A(n,k) of inequivalent n X n matrices with entries from [k], where equivalence means permutations of rows or columns or the symbol set; 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 1
8 1
9 0
10 1
11 1
12 5
13 1
14 0
15 1
16 1
17 8
18 18
19 1
20 0
21 1
22 1
23 9
24 139
25 173
26 1
27 0
28 1
29 1
30 9
31 408
32 15412
33 2812
34 1
35 0
36 1
37 1
38 9
39 649
40 332034
41 10805764
42 126446
43 1
44 0
45 1
46 1
47 9
48 749
49 2283123
50 3327329224
51 50459685390
52 16821330
53 1
54 0

List of values

[1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 5, 1, 0, 1, 1, 8, 18, 1, 0, 1, 1, 9, 139, 173, 1, 0, 1, 1, 9, 408, 15412, 2812, 1, 0, 1, 1, 9, 649, 332034, 10805764, 126446, 1, 0, 1, 1, 9, 749, 2283123, 3327329224, 50459685390, 16821330, 1, 0]