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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.

A263442 T(n,k)=Number of nXk arrays of permutations of 0..n*k-1 with each element moved a city block distance of 0 or 3.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 1
6 1
7 2
8 4
9 4
10 2
11 4
12 25
13 49
14 25
15 4
16 8
17 125
18 1770
19 1770
20 125
21 8
22 12
23 633
24 52352
25 560436
26 52352
27 633
28 12
29 18
30 2532
31 1095488
32 96348384
33 96348384
34 1095488
35 2532
36 18
37 27
38 10288
39 20725780
40 10716259649

List of values

[1, 1, 1, 1, 1, 1, 2, 4, 4, 2, 4, 25, 49, 25, 4, 8, 125, 1770, 1770, 125, 8, 12, 633, 52352, 560436, 52352, 633, 12, 18, 2532, 1095488, 96348384, 96348384, 1095488, 2532, 18, 27, 10288, 20725780, 10716259649]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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