|
|
A358808
|
|
a(n) is the minimal permanent of an n X n symmetric matrix using all the integers from 0 to n*(n + 1)/2 - 1.
|
|
4
|
|
|
|
OFFSET
|
0,4
|
|
LINKS
|
|
|
EXAMPLE
|
a(2) = 1:
[0, 1;
1, 2]
a(3) = 33:
[0, 1, 2;
1, 3, 4;
2, 4, 5]
a(4) = 2425:
[0, 2, 3, 1;
2, 8, 7, 4;
3, 7, 9, 6;
1, 4, 6, 5]
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,hard,more
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|