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 A368353 #8 Dec 30 2023 23:47:31 %S A368353 1,0,-4,-74,-1297,-39837 %N A368353 a(n) is the minimal determinant of an n X n Hankel matrix using the integers 0 to 2*(n - 1). %C A368353 a(6) <= -2579770. %H A368353 Wikipedia, <a href="https://en.wikipedia.org/wiki/Hankel_matrix">Hankel matrix</a>. %e A368353 a(2) = -4: %e A368353 1, 2; %e A368353 2, 0. %e A368353 a(3) = -74: %e A368353 1, 3, 4; %e A368353 3, 4, 0; %e A368353 4, 0, 2. %e A368353 a(4) = -1297: %e A368353 3, 2, 6, 0; %e A368353 2, 6, 0, 1; %e A368353 6, 0, 1, 4; %e A368353 0, 1, 4, 5. %Y A368353 Cf. A368354 (maximal), A368355 (maximal absolute value). %Y A368353 Cf. A358569 (minimal permanent), A358570 (maximal permanent). %K A368353 sign,hard,more %O A368353 0,3 %A A368353 _Stefano Spezia_, Dec 22 2023