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a(n) is the maximal permanent of an n X n Toeplitz matrix using the integers 0 to 2*(n - 1).
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%I #12 Dec 30 2023 23:46:19

%S 1,0,4,121,6109,494610,58369622

%N a(n) is the maximal permanent of an n X n Toeplitz matrix using the integers 0 to 2*(n - 1).

%C Also maximal permanent of an n X n Hankel matrix using the integers 0 to 2*(n - 1). - _Stefano Spezia_, Dec 22 2023

%H Lucas A. Brown, <a href="https://github.com/lucasaugustus/oeis/blob/main/A358569%2B70.sage">Sage program</a>.

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Toeplitz_matrix">Toeplitz Matrix</a>

%e a(2) = 4:

%e [2, 0;

%e 1, 2]

%e a(3) = 121:

%e [4, 2, 1;

%e 3, 4, 2;

%e 0, 3, 4]

%Y Cf. A350938 (integers from 1 to 2*n - 1), A358567 (minimal determinant), A358568 (maximal determinant), A358569 (minimal).

%K nonn,hard,more

%O 0,3

%A _Stefano Spezia_, Nov 22 2022

%E a(5)-a(6) from _Lucas A. Brown_, Dec 03 2022