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 A368351 #17 Aug 26 2024 11:43:04 %S A368351 1,1,-7,-105,-1810,-48098,-3051554,-175457984 %N A368351 a(n) is the minimal determinant of an n X n Hankel matrix using the integers 1 to 2*n - 1. %H A368351 Lucas A. Brown, <a href="https://github.com/lucasaugustus/oeis/blob/main/A368351%2B2.py">Python program</a>. %H A368351 Wikipedia, <a href="https://en.wikipedia.org/wiki/Hankel_matrix">Hankel matrix</a>. %e A368351 a(2) = -7: %e A368351 2, 3; %e A368351 3, 1. %e A368351 a(3) = -105: %e A368351 2, 4, 5; %e A368351 4, 5, 1; %e A368351 5, 1, 3. %e A368351 a(4) = -1810: %e A368351 4, 3, 7, 1; %e A368351 3, 7, 1, 2; %e A368351 7, 1, 2, 5; %e A368351 1, 2, 5, 6. %Y A368351 Cf. A350931 (maximal absolute value), A368352 (maximal). %Y A368351 Cf. A350937 (minimal permanent), A350938 (maximal permanent). %K A368351 sign,hard,more %O A368351 0,3 %A A368351 _Stefano Spezia_, Dec 22 2023 %E A368351 a(6)-a(7) from _Lucas A. Brown_, Aug 26 2024