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.

A207116 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.

Table of values

n a(n)
1 14
2 196
3 826
4 3641
5 13863
6 42874
7 139341
8 402498
9 1153962
10 3259098
11 8878431
12 24420005
13 65876246
14 177547567
15 478191946
16 1279250394
17 3433218078
18 9182843871
19 24565794267
20 65742901568
21 175705176107
22 470018725612
23 1256530345118

List of values

[14, 196, 826, 3641, 13863, 42874, 139341, 402498, 1153962, 3259098, 8878431, 24420005, 65876246, 177547567, 478191946, 1279250394, 3433218078, 9182843871, 24565794267, 65742901568, 175705176107, 470018725612, 1256530345118]

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

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