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A386204 Number of distinct values of the determinant of an n X n (0,1)-matrix with exactly three 1's in each row and each column.

%I A386204 #10 Jul 20 2025 22:30:21
%S A386204 1,2,3,3,7,11,7
%N A386204 Number of distinct values of the determinant of an n X n (0,1)-matrix with exactly three 1's in each row and each column.
%C A386204 a(10) >= 25.
%H A386204 Robert P. P. McKone, <a href="/A386204/a386204.py.txt">Python code to find A386204(n) unique determinants and one example matrix</a>
%H A386204 Robert P. P. McKone, <a href="/A386204/a386204.txt">One example matrix for each known determinant for a(3)-a(9)</a>
%Y A386204 Cf. A185178 (distinct permanents).
%Y A386204 Cf. A001501 (number of n X n (0,1)-matrix with exactly three 1's in each row and each column).
%K A386204 nonn,hard,more
%O A386204 3,2
%A A386204 _Robert P. P. McKone_, Jul 15 2025