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.

A208557 Number of 5 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 0 1 1 vertically.

Table of values

n a(n)
1 12
2 144
3 420
4 2508
5 10080
6 50052
7 221340
8 1042416
9 4742628
10 21989868
11 100900800
12 465657348
13 2142175548
14 9872120016
15 45450619620
16 209366048652
17 964140982560
18 4440671206788
19 20451041895900
20 94190120555184
21 433792784654052

List of values

[12, 144, 420, 2508, 10080, 50052, 221340, 1042416, 4742628, 21989868, 100900800, 465657348, 2142175548, 9872120016, 45450619620, 209366048652, 964140982560, 4440671206788, 20451041895900, 94190120555184, 433792784654052]

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

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