OFFSET
2,2
LINKS
EXAMPLE
a(3) = 3:
[1, 0, 2;
0, 1, 0;
2, 0, 1]
a(4) = 12:
[3, 2, 1, 0;
2, 3, 2, 1;
1, 2, 3, 2;
0, 1, 2, 3]
a(5) = 2:
[0, 4, 1, 2, 3;
4, 0, 4, 1, 2;
1, 4, 0, 4, 1;
2, 1, 4, 0, 4;
3, 2, 1, 4, 0]
MATHEMATICA
Table[Min[Select[Table[Abs[Det[ToeplitzMatrix[Part[Permutations[Join[{0}, Range[n-1]]], i]]]], {i, n!}], Positive]], {n, 2, 9}] (* Corrected by Stefano Spezia, Nov 17 2022 *)
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Stefano Spezia, Nov 09 2022
EXTENSIONS
a(3), a(7), and a(10)-a(12) from Lucas A. Brown, Nov 16 2022
STATUS
approved