cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A358809 a(n) is the maximal 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, 4, 186, 21823, 4569098, 1713573909
Offset: 0

Views

Author

Stefano Spezia, Dec 02 2022

Keywords

Examples

			a(2) = 4:
    [0, 2;
     2, 1]
a(3) = 186:
    [0, 4, 5;
     4, 2, 3;
     5, 3, 1]

Crossrefs

Cf. A000217, A351153, A351611.
Cf. A358806 (minimal determinant), A358807 (maximal determinant), A358808 (minimal).

Extensions

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

A351610 Minimal permanent of an n X n symmetric matrix using the integers 1 to n*(n + 1)/2.

Original entry on oeis.org

1, 1, 7, 163, 9850, 1243806, 284995981
Offset: 0

Views

Author

Stefano Spezia, Feb 14 2022

Keywords

Examples

			a(3) = 163:
   1    2    3
   2    5    4
   3    4    6
a(4) = 9850:
   1    2    3    4
   2    8    5    6
   3    5    9    7
   4    6    7   10

Crossrefs

Cf. A000217, A351153, A351611 (maximal).
Cf. A350565, A350858, A350937, A350939, A351019, A351021.

Extensions

a(5)-a(6) from Hugo Pfoertner, Feb 15 2022
Showing 1-2 of 2 results.

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