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A368355 a(n) is the maximal absolute value of the determinant of an n X n Hankel matrix using the integers 0 to 2*(n - 1).

%I A368355 #12 Dec 30 2023 23:47:57
%S A368355 1,0,4,74,1781,58180
%N A368355 a(n) is the maximal absolute value of the determinant of an n X n Hankel matrix using the integers 0 to 2*(n - 1).
%C A368355 a(6) >= 2579770.
%H A368355 Wikipedia, <a href="https://en.wikipedia.org/wiki/Hankel_matrix">Hankel matrix</a>.
%F A368355 a(n) = max(-A368353(n), A368354(n)).
%e A368355 a(2) = 4:
%e A368355   1, 2;
%e A368355   2, 0.
%e A368355 a(3) = 74:
%e A368355   1, 3, 4;
%e A368355   3, 4, 0;
%e A368355   4, 0, 2.
%e A368355 a(4) = 1781:
%e A368355   1, 2, 5, 6;
%e A368355   2, 5, 6, 0;
%e A368355   5, 6, 0, 4;
%e A368355   6, 0, 4, 3.
%Y A368355 Cf. A368353 (minimal signed), A368354 (maximal signed).
%Y A368355 Cf. A358569 (minimal permanent), A358570 (maximal permanent).
%K A368355 nonn,hard,more
%O A368355 0,3
%A A368355 _Stefano Spezia_, Dec 22 2023