OFFSET
0,4
LINKS
EXAMPLE
a(3) = 12:
[2, 1, 0;
1, 2, 1;
0, 1, 2]
a(4) = 304:
[2, 3, 1, 0;
3, 2, 3, 1;
1, 3, 2, 3;
0, 1, 3, 2]
a(5) = 12696:
[3, 4, 2, 1, 0;
4, 3, 4, 2, 1;
2, 4, 3, 4, 2;
1, 2, 4, 3, 4;
0, 1, 2, 4, 3]
MATHEMATICA
Join[{1}, Table[Max[Table[Permanent[ToeplitzMatrix[Part[Permutations[Join[{0}, Range[n-1]]], i]]], {i, n!}]], {n, 9}]]
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Stefano Spezia, Nov 09 2022
EXTENSIONS
a(10) and a(11) from Lucas A. Brown, Nov 16 2022
STATUS
approved