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.

Showing 1-2 of 2 results.

A065711 The Alon-Tarsi constants AT(n).

Original entry on oeis.org

1, -1, 4, -24, 2304, 368640, 6210846720, 2086844497920, 27369126116720640000
Offset: 2

Views

Author

Jan Siwanowicz (jansiwanowicz(AT)yahoo.com), Dec 04 2001

Keywords

Comments

The extended Alon-Tarsi conjecture states AT(n)<>0 for every positive integer n. Several cases have been proved - see references.

Crossrefs

Cf. A114631 (fdels), A114632 (fdols).

Formula

AT(n)=(fdels(n)-fdols(n))/(n-1)!, where fdels(n) and fdols(n) are the numbers of fixed diagonal even and fixed diagonal odd Latin squares, respectively.

Extensions

Terms a(9) and a(10) added by Jochem Berndsen, Jun 05 2012

A114632 Number of odd fixed diagonal Latin squares.

Original entry on oeis.org

0, 0, 2, 0, 960, 426240, 5966438400, 1333257798942720
Offset: 1

Views

Author

Eric W. Weisstein, Dec 18 2005

Keywords

Crossrefs

Showing 1-2 of 2 results.