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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.

A372385 Determinant of the matrix [Jacobi(i - j, 2n + 1)]_{0 < i, j < n}, where Jacobi(a, m) denotes the Jacobi symbol (a/m).

Table of values

n a(n)
2 0
3 1
4 2
5 1
6 8
7 16
8 2
9 1
10 -56
11 1
12 0
13 0
14 44
15 1
16 127776
17 1067089
18 592
19 7311616
20 22
21 1
22 0
23 1
24 0
25 98867482624
26 132
27 1933242748921
28 31578700795392
29 1
30 22108
31 0
32 -6001552839958
33 1
34 -2401383183590221824
35 1
36 818
37 0
38 95506686981729056
39 1
40 0
41 1
42 30328979503109918400
43 208688450689382571638784
44 394

List of values

[0, 1, 2, 1, 8, 16, 2, 1, -56, 1, 0, 0, 44, 1, 127776, 1067089, 592, 7311616, 22, 1, 0, 1, 0, 98867482624, 132, 1933242748921, 31578700795392, 1, 22108, 0, -6001552839958, 1, -2401383183590221824, 1, 818, 0, 95506686981729056, 1, 0, 1, 30328979503109918400, 208688450689382571638784, 394]