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.

A188517 Number of nX3 binary arrays without the pattern 1 1 0 diagonally, vertically or horizontally.

Table of values

n a(n)
1 7
2 49
3 229
4 1016
5 4143
6 16438
7 63575
8 242843
9 918833
10 3457086
11 12955090
12 48421778
13 180653858
14 673156166
15 2506152176
16 9324771027
17 34680539851
18 128945324565
19 479330913137
20 1781567026168
21 6621013690288
22 24604558144729
23 91429145674242

List of values

[7, 49, 229, 1016, 4143, 16438, 63575, 242843, 918833, 3457086, 12955090, 48421778, 180653858, 673156166, 2506152176, 9324771027, 34680539851, 128945324565, 479330913137, 1781567026168, 6621013690288, 24604558144729, 91429145674242]

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

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