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.

A203084 Number of (n+2) X 3 binary arrays avoiding patterns 000 and 101 in rows and columns.

Table of values

n a(n)
1 98
2 253
3 621
4 1575
5 4000
6 10057
7 25384
8 64140
9 161819
10 408415
11 1031041
12 2602296
13 6568305
14 16579362
15 41847510
16 105626421
17 266611217
18 672949667
19 1698582936
20 4287374163
21 10821707646
22 27314936026
23 68945297129
24 174023973205

List of values

[98, 253, 621, 1575, 4000, 10057, 25384, 64140, 161819, 408415, 1031041, 2602296, 6568305, 16579362, 41847510, 105626421, 266611217, 672949667, 1698582936, 4287374163, 10821707646, 27314936026, 68945297129, 174023973205]

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

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