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.

A233233 Number of n X n 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.

Table of values

n a(n)
1 1
2 19
3 18744
4 338046654
5 83262848013541
6 273407904115337411320
7 11963921132630138069523033663
8 6976482888479442637729140675454130898

List of values

[1, 19, 18744, 338046654, 83262848013541, 273407904115337411320, 11963921132630138069523033663, 6976482888479442637729140675454130898]

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

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