A351610 -id:A351610 - cp's OEIS frontend

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.

1, 0, 1, 33, 2425, 357046, 92052610

Offset: 0

Stefano Spezia, Dec 02 2022

			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]

Cf. A000217, A351153, A351610.

Cf. A358806 (minimal determinant), A358807 (maximal determinant), A358809 (maximal).

a(4) corrected and a(5)-a(6) from Hugo Pfoertner, Dec 07 2022

A351611 Maximal permanent of an n X n symmetric matrix using the integers 1 to n*(n + 1)/2.

Original entry on oeis.org

1, 1, 11, 420, 41451, 7985639, 2779152652

Offset: 0

Stefano Spezia, Feb 14 2022

			a(3) = 420:
    1    5    6
    5    3    4
    6    4    2
a(4) = 41451:
    1    5    8   10
    5    4    9    7
    8    9    3    6
   10    7    6    2

Cf. A000217, A351153, A351610 (minimal).

Cf. A350566, A350859, A350938, A350940, A351020, A351022.

a(5)-a(6) from Hugo Pfoertner, Feb 15 2022

cp's OEIS Frontend

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.

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