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.

A196450 Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,2,4,1 for x=0,1,2,3,4.

Table of values

n a(n)
1 3
2 6
3 14
4 30
5 67
6 146
7 320
8 706
9 1550
10 3403
11 7481
12 16443
13 36131
14 79399
15 174500
16 383499
17 842796
18 1852205
19 4070612
20 8945988
21 19660603
22 43208249
23 94959144
24 208692464
25 458645240
26 1007969053
27 2215223460
28 4868418432
29 10699372182
30 23514119454

List of values

[3, 6, 14, 30, 67, 146, 320, 706, 1550, 3403, 7481, 16443, 36131, 79399, 174500, 383499, 842796, 1852205, 4070612, 8945988, 19660603, 43208249, 94959144, 208692464, 458645240, 1007969053, 2215223460, 4868418432, 10699372182, 23514119454]