cp's OEIS Frontend

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.

A229827 Number of circular permutations i_1,...,i_n of 1,...,n such that the n numbers i_1^2+i_2, i_2^2+i_3, ..., i_{n-1}^2+i_n, i_n^2+i_1 form a complete system of residues modulo n.

Table of values

n a(n)
2 0
3 0
4 0
5 4
6 0
7 24
8 0
9 0
10 0
11 5308
12 0
13 123884
14 0
15 0
16 0
17 147288372
18 0
19 7238567052
20 0
21 0
22 0

List of values

[0, 0, 0, 4, 0, 24, 0, 0, 0, 5308, 0, 123884, 0, 0, 0, 147288372, 0, 7238567052, 0, 0, 0]

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

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