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.

A207770 Number of n X 4 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 0 vertically.

Table of values

n a(n)
1 10
2 100
3 292
4 828
5 2514
6 7164
7 20104
8 57458
9 165182
10 475522
11 1374786
12 3988072
13 11586166
14 33700098
15 98126672
16 285904744
17 833354524
18 2429866940
19 7086585498
20 20670718296
21 60300595980
22 175923202614
23 513272786306
24 1497579333338

List of values

[10, 100, 292, 828, 2514, 7164, 20104, 57458, 165182, 475522, 1374786, 3988072, 11586166, 33700098, 98126672, 285904744, 833354524, 2429866940, 7086585498, 20670718296, 60300595980, 175923202614, 513272786306, 1497579333338]

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

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