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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.

A216797 Number of permutations of an n X 5 array with each element moving exactly one horizontally or vertically and without 2-loops.

Table of values

n a(n)
1 0
2 10
3 0
4 292
5 0
6 10140
7 0
8 361200
9 0
10 12911864
11 0
12 461788640
13 0
14 16516859104
15 0
16 590766585904
17 0
18 21130267285488
19 0
20 755777826856944
21 0
22 27032319708816080
23 0
24 966879797484085808
25 0
26 34582919761038885136
27 0
28 1236946249622251150000
29 0

List of values

[0, 10, 0, 292, 0, 10140, 0, 361200, 0, 12911864, 0, 461788640, 0, 16516859104, 0, 590766585904, 0, 21130267285488, 0, 755777826856944, 0, 27032319708816080, 0, 966879797484085808, 0, 34582919761038885136, 0, 1236946249622251150000, 0]

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

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