A358809 -id:A358809 - cp's OEIS frontend

A358806 a(n) is the minimal determinant of an n X n symmetric matrix using all the integers from 0 to n*(n + 1)/2 - 1.

1, 0, -4, -110, -5072, -488212, -86577891

Offset: 0

Stefano Spezia, Dec 02 2022

			a(2) = -4:
    [0, 2;
     2, 1]
a(3) = -110:
    [1, 3, 5;
     3, 4, 0;
     5, 0, 2]

Cf. A000217, A351147, A351153.

Cf. A358807 (maximal), A358808 (minimal permanent), A358809 (maximal permanent).

A358807 a(n) is the maximal determinant of an n X n symmetric matrix using all the integers from 0 to n*(n + 1)/2 - 1.

Original entry on oeis.org

1, 0, 2, 86, 5911, 652189, 82173814

Offset: 0

Stefano Spezia, Dec 02 2022

			a(2) = 2:
    [1, 0;
     0, 2]
a(3) = 86:
    [0, 3, 4;
     3, 1, 5;
     4, 5, 2]

Cf. A000217, A351148, A351153.

Cf. A358806 (minimal), A358808 (minimal permanent), A358809 (maximal permanent).

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.

Original entry on oeis.org

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

A358779 a(n) is the maximal absolute value of the determinant of an n X n symmetric matrix using all the integers from 0 to n*(n + 1)/2 - 1.

Original entry on oeis.org

1, 0, 4, 110, 5911, 652189, 86577891

Offset: 0

Stefano Spezia, Dec 05 2022

Cf. A000217, A351153, A351609.

Cf. A358806 (minimal determinant), A358807 (maximal determinant), A358808 (minimal permanent), A358809 (maximal permanent).

a(n) = max(abs(A358806(n)), A358807(n)).

cp's OEIS Frontend

A358806 a(n) is the minimal determinant of an n X n symmetric matrix using all the integers from 0 to n*(n + 1)/2 - 1.

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A358807 a(n) is the maximal determinant of an n X n symmetric matrix using all the integers from 0 to n*(n + 1)/2 - 1.

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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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A358779 a(n) is the maximal absolute value of the determinant of an n X n symmetric matrix using all the integers from 0 to n*(n + 1)/2 - 1.

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