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.

A207707 Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 0 vertically.

Table of values

n a(n)
1 12
2 144
3 636
4 2809
5 17225
6 105625
7 571350
8 3090564
9 17518470
10 99301225
11 552967815
12 3079251081
13 17262695190
14 96776988100
15 541164386750
16 3026121180625
17 16938024328125
18 94806734765625
19 530464911052500
20 2968069964160016

List of values

[12, 144, 636, 2809, 17225, 105625, 571350, 3090564, 17518470, 99301225, 552967815, 3079251081, 17262695190, 96776988100, 541164386750, 3026121180625, 16938024328125, 94806734765625, 530464911052500, 2968069964160016]

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

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