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.

A067221 Number of n X n 0..13 matrices with all row and column sums equal.

Original entry on oeis.org

1, 14, 196, 162722, 21592075596, 428134536074377254, 1326740266296956878519910950
Offset: 0

Views

Author

R. H. Hardin, Feb 20 2002

Keywords

Crossrefs

Column k=13 of A202784.

Extensions

a(5)-a(6) from Sean A. Irvine, Dec 10 2023
a(0)=1 prepended by Andrew Howroyd, Oct 14 2024

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.