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.

A147607 Expansion of g.f.: 1/((1 - 2*x^2 + x^4 + 2*x^6 - x^8)*(1 - 2*x^2 - x^4 + 2*x^6 - x^8)).

Table of values

n a(n)
0 1
1 0
2 4
3 0
4 12
5 0
6 28
7 0
8 59
9 0
10 116
11 0
12 228
13 0
14 460
15 0
16 968
17 0
18 2092
19 0
20 4564
21 0
22 9908
23 0
24 21309
25 0
26 45444
27 0
28 96484
29 0
30 204700
31 0
32 434999
33 0
34 926440
35 0
36 1976344
37 0
38 4218936
39 0
40 9005328
41 0
42 19212728
43 0
44 40970200
45 0
46 87341032
47 0
48 186180665
49 0
50 396899620

List of values

[1, 0, 4, 0, 12, 0, 28, 0, 59, 0, 116, 0, 228, 0, 460, 0, 968, 0, 2092, 0, 4564, 0, 9908, 0, 21309, 0, 45444, 0, 96484, 0, 204700, 0, 434999, 0, 926440, 0, 1976344, 0, 4218936, 0, 9005328, 0, 19212728, 0, 40970200, 0, 87341032, 0, 186180665, 0, 396899620]