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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.

A374242 a(n) is the minimal absolute value of the determinant of a nonsingular n X n symmetric Toeplitz matrix having 1 on the main diagonal and all the integers 1, 2, ..., n-1 off-diagonal.

Table of values

n a(n)
3 1
4 1
5 3
6 9
7 3
8 1
9 5
10 9
11 1
12 1
13 1
14 1

List of values

[1, 1, 3, 9, 3, 1, 5, 9, 1, 1, 1, 1]