%I #15 Oct 14 2019 15:14:52
%S 1,1,3,18,160,2325,41895,961772,26978400,929587995,36843728625,
%T 1705290814194,89802671542272,5336424046419557,354379732734283200,
%U 26173529641406219400
%N Maximum determinant of a circulant n X n matrix whose rows are permutations of [1,2,..,n].
%C It is conjectured that A309985 is identical to this sequence. See Mathematics Stack Exchange link. The first rows of the corresponding circulant matrices are provided in A328029.
%H Mathematics Stack Exchange, <a href="https://math.stackexchange.com/questions/885481/maximum-determinant-of-latin-squares">Maximum determinant of Latin squares</a>, (2014), (2016).
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Circulant_matrix">Circulant matrix</a>.
%F a(n) = A309985(n) for n <= 9.
%F a(n) <= A328031(n).
%Y Cf. A309985, A328029, A328031.
%K nonn,more,hard
%O 0,3
%A _Hugo Pfoertner_, Oct 02 2019
%E a(15) from _Hugo Pfoertner_, Oct 14 2019