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.
%I A358567 #10 Dec 03 2022 09:19:04 %S A358567 1,0,-2,-31,-1297,-39837,-2256911,-99518694 %N A358567 a(n) is the minimal determinant of an n X n Toeplitz matrix using the integers 0 to 2*(n - 1). %H A358567 Lucas A. Brown, <a href="https://github.com/lucasaugustus/oeis/blob/main/A358567%2B8.py">Python program</a>. %H A358567 Wikipedia, <a href="http://en.wikipedia.org/wiki/Toeplitz_matrix">Toeplitz Matrix</a> %e A358567 a(2) = -2: %e A358567 [0, 1; %e A358567 2, 0] %e A358567 a(3) = -31: %e A358567 [2, 3, 0; %e A358567 4, 2, 3; %e A358567 1, 4, 2] %Y A358567 Cf. A350930 (integers from 1 to 2*n - 1), A358568 (maximal), A358569 (minimal permanent), A358570 (maximal permanent). %K A358567 sign,hard,more %O A358567 0,3 %A A358567 _Stefano Spezia_, Nov 22 2022 %E A358567 a(5)-a(7) from _Lucas A. Brown_, Dec 03 2022