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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.

A188958 T(n,k)=Number of nXk array permutations with each element moved no more than a city block distance of two.

Table of values

n a(n)
1 1
2 2
3 2
4 6
5 24
6 6
7 14
8 362
9 362
10 14
11 31
12 3969
13 29172
14 3969
15 31
16 73
17 45288
18 1722256
19 1722256
20 45288
21 73
22 172
23 532224
24 104735558
25 504690017
26 104735558
27 532224
28 172
29 400
30 6187928
31 6513224285
32 151700751624
33 151700751624
34 6513224285
35 6187928
36 400

List of values

[1, 2, 2, 6, 24, 6, 14, 362, 362, 14, 31, 3969, 29172, 3969, 31, 73, 45288, 1722256, 1722256, 45288, 73, 172, 532224, 104735558, 504690017, 104735558, 532224, 172, 400, 6187928, 6513224285, 151700751624, 151700751624, 6513224285, 6187928, 400]

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

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