OFFSET
0,3
COMMENTS
Also maximal permanent of an n X n Hankel matrix using the integers 0 to 2*(n - 1). - Stefano Spezia, Dec 22 2023
LINKS
EXAMPLE
a(2) = 4:
[2, 0;
1, 2]
a(3) = 121:
[4, 2, 1;
3, 4, 2;
0, 3, 4]
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Stefano Spezia, Nov 22 2022
EXTENSIONS
a(5)-a(6) from Lucas A. Brown, Dec 03 2022
STATUS
approved