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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.

A263424 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 2.

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 4
6 2
7 4
8 36
9 36
10 4
11 6
12 196
13 1272
14 196
15 6
16 9
17 961
18 26244
19 26244
20 961
21 9
22 15
23 5329
24 532620
25 1993744
26 532620
27 5329
28 15
29 25
30 29584
31 11751184
32 141086884
33 141086884
34 11751184
35 29584
36 25
37 40
38 160000
39 256052940
40 10808097444
41 34502512032

List of values

[1, 1, 1, 2, 4, 2, 4, 36, 36, 4, 6, 196, 1272, 196, 6, 9, 961, 26244, 26244, 961, 9, 15, 5329, 532620, 1993744, 532620, 5329, 15, 25, 29584, 11751184, 141086884, 141086884, 11751184, 29584, 25, 40, 160000, 256052940, 10808097444, 34502512032]

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

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