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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.

A174563 Number of 3 X n Latin rectangles such that every element of the second row has the same cyclic order (see comment).

Table of values

n a(n)
3 1
4 14
5 133
6 3300
7 93889
8 3391086
9 148674191
10 7796637196
11 480640583751
12 34370030511334
13 2818294139246649
14 262403744798653716
15 27506121212584723373
16 3222018028986227724702
17 418998630100386520363619
18 60138044879434564251209580
19 9477043948863636836099726259
20 1632099068624734991723488992214

List of values

[1, 14, 133, 3300, 93889, 3391086, 148674191, 7796637196, 480640583751, 34370030511334, 2818294139246649, 262403744798653716, 27506121212584723373, 3222018028986227724702, 418998630100386520363619, 60138044879434564251209580, 9477043948863636836099726259, 1632099068624734991723488992214]

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

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