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.

A267641 Number of nX5 0..1 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.

Table of values

n a(n)
1 7
2 98
3 429
4 2887
5 8917
6 47715
7 128441
8 647101
9 1614281
10 8168679
11 19332185
12 101212349
13 229707509
14 1260768903
15 2761416109
16 15947280405
17 33873126897
18 205385367891
19 424974329569
20 2690957511285
21 5447493560049
22 35782122811899

List of values

[7, 98, 429, 2887, 8917, 47715, 128441, 647101, 1614281, 8168679, 19332185, 101212349, 229707509, 1260768903, 2761416109, 15947280405, 33873126897, 205385367891, 424974329569, 2690957511285, 5447493560049, 35782122811899]

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

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