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.

A284767 Number of n X 4 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.

Table of values

n a(n)
1 2
2 52
3 720
4 10120
5 145822
6 2134812
7 31677488
8 474539092
9 7162528912
10 108751977400
11 1659266548448
12 25419213710160
13 390755520225882
14 6024619021179564
15 93124153758520074
16 1442654093474307468

List of values

[2, 52, 720, 10120, 145822, 2134812, 31677488, 474539092, 7162528912, 108751977400, 1659266548448, 25419213710160, 390755520225882, 6024619021179564, 93124153758520074, 1442654093474307468]

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

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