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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.

A188962 T(n,k)=Number of nXk array permutations with each element moved by a city block distance of no more than three.

Table of values

n a(n)
1 1
2 2
3 2
4 6
5 24
6 6
7 24
8 720
9 720
10 24
11 78
12 24024
13 229080
14 24024
15 78
16 230
17 570050
18 75764664
19 75764664
20 570050
21 230
22 675
23 12702057
24 17316382188
25 251096032912
26 17316382188
27 12702057
28 675
29 2069
30 298167456
31 3909049448304
32 573780546403024

List of values

[1, 2, 2, 6, 24, 6, 24, 720, 720, 24, 78, 24024, 229080, 24024, 78, 230, 570050, 75764664, 75764664, 570050, 230, 675, 12702057, 17316382188, 251096032912, 17316382188, 12702057, 675, 2069, 298167456, 3909049448304, 573780546403024]

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

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