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a(n) is the minimal determinant of an n X n symmetric matrix using all the integers from 0 to n*(n + 1)/2 - 1.
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%I #14 Dec 06 2022 09:57:48

%S 1,0,-4,-110,-5072,-488212,-86577891

%N a(n) is the minimal determinant of an n X n symmetric matrix using all the integers from 0 to n*(n + 1)/2 - 1.

%e a(2) = -4:

%e [0, 2;

%e 2, 1]

%e a(3) = -110:

%e [1, 3, 5;

%e 3, 4, 0;

%e 5, 0, 2]

%Y Cf. A000217, A351147, A351153.

%Y Cf. A358807 (maximal), A358808 (minimal permanent), A358809 (maximal permanent).

%K sign,hard,more

%O 0,3

%A _Stefano Spezia_, Dec 02 2022