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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.

A129391 Expansion of phi(-x) * phi(x^5) / (chi(-x^2) * chi(-x^10)) in powers of x where phi(), chi() are Ramanujan theta functions.

Table of values

n a(n)
0 1
1 -2
2 1
3 -2
4 3
5 0
6 0
7 -2
8 0
9 0
10 4
11 -2
12 1
13 -4
14 2
15 0
16 0
17 -2
18 0
19 0
20 2
21 -2
22 3
23 -2
24 3
25 0
26 0
27 0
28 0
29 0
30 2
31 -6
32 0
33 -2
34 4
35 0
36 0
37 -2
38 0
39 0
40 5
41 -2
42 0
43 -4
44 2
45 0
46 0
47 0
48 0
49 0
50 2
51 -2
52 4
53 -2
54 2
55 0
56 0
57 -2
58 0
59 0
60 1
61 -4
62 1
63 -2
64 4
65 0
66 0
67 -4
68 0
69 0
70 4
71 0
72 2
73 -6
74 2
75 0
76 0
77 0
78 0
79 0

List of values

[1, -2, 1, -2, 3, 0, 0, -2, 0, 0, 4, -2, 1, -4, 2, 0, 0, -2, 0, 0, 2, -2, 3, -2, 3, 0, 0, 0, 0, 0, 2, -6, 0, -2, 4, 0, 0, -2, 0, 0, 5, -2, 0, -4, 2, 0, 0, 0, 0, 0, 2, -2, 4, -2, 2, 0, 0, -2, 0, 0, 1, -4, 1, -2, 4, 0, 0, -4, 0, 0, 4, 0, 2, -6, 2, 0, 0, 0, 0, 0]

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