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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.

A275554 Number of classes of endofunctions of [n] under vertical translation mod n, rotation and complement to n+1.

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 14
5 65
6 680
7 8407
8 131416
9 2391515
10 50006040
11 1178973851
12 30958827996
13 896080197025
14 28346960490560
15 973097534189967
16 36028797169965112
17 1431211525754907905
18 60719765554419645244
19 2740193428892401092979
20 131072000000281600209176

List of values

[1, 1, 2, 3, 14, 65, 680, 8407, 131416, 2391515, 50006040, 1178973851, 30958827996, 896080197025, 28346960490560, 973097534189967, 36028797169965112, 1431211525754907905, 60719765554419645244, 2740193428892401092979, 131072000000281600209176]

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

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