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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.

A261630 Expansion of Product_{k>=0} (1+x^(4*k+1))^2.

Table of values

n a(n)
0 1
1 2
2 1
3 0
4 0
5 2
6 4
7 2
8 0
9 2
10 5
11 4
12 1
13 2
14 8
15 10
16 4
17 2
18 9
19 14
20 9
21 4
22 12
23 22
24 16
25 6
26 13
27 30
28 30
29 14
30 17
31 40
32 44
33 24
34 21
35 50
36 66
37 42
38 29
39 64
40 92
41 66
42 41
43 78
44 127
45 106
46 62
47 96
48 164
49 152
50 93
51 120
52 215
53 220
54 139
55 150
56 269
57 302
58 205
59 192
60 340
61 412
62 296
63 248
64 417

List of values

[1, 2, 1, 0, 0, 2, 4, 2, 0, 2, 5, 4, 1, 2, 8, 10, 4, 2, 9, 14, 9, 4, 12, 22, 16, 6, 13, 30, 30, 14, 17, 40, 44, 24, 21, 50, 66, 42, 29, 64, 92, 66, 41, 78, 127, 106, 62, 96, 164, 152, 93, 120, 215, 220, 139, 150, 269, 302, 205, 192, 340, 412, 296, 248, 417]