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.

A208380 Number of 4 X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 1 vertically.

Table of values

n a(n)
1 8
2 64
3 108
4 420
5 1344
6 4212
7 13860
8 44880
9 144540
10 468852
11 1517184
12 4906980
13 15883764
14 51401040
15 166325292
16 538259268
17 1741843392
18 5636673684
19 18240740100
20 59028275280
21 191019298428
22 618151779156
23 2000381177088
24 6473368570500

List of values

[8, 64, 108, 420, 1344, 4212, 13860, 44880, 144540, 468852, 1517184, 4906980, 15883764, 51401040, 166325292, 538259268, 1741843392, 5636673684, 18240740100, 59028275280, 191019298428, 618151779156, 2000381177088, 6473368570500]