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.

A269336 T(n,k)=Number of nXk arrays containing k copies of 0..n-1 avoiding the pattern equal-up in every row and column.

Table of values

n a(n)
1 1
2 1
3 2
4 1
5 6
6 6
7 1
8 14
9 74
10 24
11 1
12 34
13 852
14 1880
15 120
16 1
17 78
18 10210
19 152922
20 80316
21 720
22 1
23 178
24 124466
25 13745475
26 62038644
27 5141864
28 5040
29 1
30 398
31 1539739
32 1301306034
33 55575194220
34 47286888510
35 458608016
36 40320
37 1
38 882
39 19271229
40 128342085219

List of values

[1, 1, 2, 1, 6, 6, 1, 14, 74, 24, 1, 34, 852, 1880, 120, 1, 78, 10210, 152922, 80316, 720, 1, 178, 124466, 13745475, 62038644, 5141864, 5040, 1, 398, 1539739, 1301306034, 55575194220, 47286888510, 458608016, 40320, 1, 882, 19271229, 128342085219]