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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.

A239051 Expansion of (f(-q^2, -q^3)^5 - 3 * q * f(-q, -q^4)^5) / f(-q)^3 in powers of q where f() is a Ramanujan theta function.

Table of values

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

List of values

[1, 0, 10, -10, 10, 0, 0, 10, 0, -10, 10, 0, 10, -10, 20, -10, 0, 10, -10, 0, 10, 0, 20, -10, 0, 0, 0, 0, 10, 0, 0, 0, 10, -20, 20, 10, 0, 10, 0, -20, 0, 0, 20, -10, 20, -10, 0, 10, -10, 10, 10, 0, 10, -10, 0, 0, 0, 0, 0, 0, 10, 0, 20, -10, 10, -10, 0, 10, 10]

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