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.

A067210 Number of n X n 0..2 matrices with all row and column sums equal.

Table of values

n a(n)
0 1
1 3
2 9
3 87
4 5673
5 2577513
6 8459809773
7 207495141083975
8 39125696231091082665
9 57899300601363050181107733
10 683382115404724657577266518831159
11 65156055488094891194179319045960728827635
12 50704966066306827486637758645370695372532720829085

List of values

[1, 3, 9, 87, 5673, 2577513, 8459809773, 207495141083975, 39125696231091082665, 57899300601363050181107733, 683382115404724657577266518831159, 65156055488094891194179319045960728827635, 50704966066306827486637758645370695372532720829085]

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

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