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.

A198179 Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,2,1,0,0 for x=0,1,2,3,4.

Table of values

n a(n)
1 0
2 4
3 3
4 8
5 16
6 21
7 56
8 70
9 171
10 256
11 516
12 905
13 1622
14 3048
15 5293
16 9992
17 17564
18 32517
19 58330
20 106144
21 192767
22 348188
23 634426
24 1145535
25 2084360
26 3771658
27 6847617
28 12413706
29 22507930
30 40835531
31 74015802
32 134288434
33 243440863
34 441575714

List of values

[0, 4, 3, 8, 16, 21, 56, 70, 171, 256, 516, 905, 1622, 3048, 5293, 9992, 17564, 32517, 58330, 106144, 192767, 348188, 634426, 1145535, 2084360, 3771658, 6847617, 12413706, 22507930, 40835531, 74015802, 134288434, 243440863, 441575714]