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.

A208684 Number of nX4 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 0 1 vertically.

Table of values

n a(n)
1 10
2 100
3 282
4 927
5 3430
6 11067
7 34627
8 111642
9 356116
10 1121500
11 3542847
12 11196360
13 35283685
14 111150345
15 350234962
16 1103073000
17 3473204686
18 10936009567
19 34431544350
20 108396961047
21 341246282767
22 1074267088938
23 3381794658280

List of values

[10, 100, 282, 927, 3430, 11067, 34627, 111642, 356116, 1121500, 3542847, 11196360, 35283685, 111150345, 350234962, 1103073000, 3473204686, 10936009567, 34431544350, 108396961047, 341246282767, 1074267088938, 3381794658280]

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

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