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.

A067220 Number of n X n 0..12 matrices with all row and column sums equal.

Original entry on oeis.org

1, 13, 169, 112489, 10309971465, 121778484808846083, 193842679171307621077398205
Offset: 0

Views

Author

R. H. Hardin, Feb 20 2002

Keywords

Crossrefs

Column k=12 of A202784.

Extensions

a(5)-a(6) from Sean A. Irvine, Dec 11 2023
a(0)=1 prepended by Andrew Howroyd, Oct 14 2024

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