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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.

A258228 Expansion of f(q) * f(-q^2) * chi(q^3) in powers of q where chi(), f() are Ramanujan theta functions.

Table of values

n a(n)
0 1
1 1
2 -2
3 0
4 1
5 -4
6 0
7 0
8 -2
9 4
10 2
11 0
12 0
13 2
14 0
15 0
16 1
17 -4
18 4
19 0
20 -4
21 0
22 0
23 0
24 0
25 3
26 -4
27 0
28 0
29 -4
30 0
31 0
32 -2
33 0
34 2
35 0
36 4
37 2
38 0
39 0
40 2
41 -4
42 0
43 0
44 0
45 8
46 0
47 0
48 0
49 1
50 -6
51 0
52 2
53 -4
54 0
55 0
56 0
57 0
58 2
59 0
60 0
61 2
62 0
63 0
64 1
65 -8
66 0
67 0
68 -4
69 0
70 0
71 0
72 4
73 2
74 -4
75 0
76 0
77 0
78 0
79 0
80 -4
81 4

List of values

[1, 1, -2, 0, 1, -4, 0, 0, -2, 4, 2, 0, 0, 2, 0, 0, 1, -4, 4, 0, -4, 0, 0, 0, 0, 3, -4, 0, 0, -4, 0, 0, -2, 0, 2, 0, 4, 2, 0, 0, 2, -4, 0, 0, 0, 8, 0, 0, 0, 1, -6, 0, 2, -4, 0, 0, 0, 0, 2, 0, 0, 2, 0, 0, 1, -8, 0, 0, -4, 0, 0, 0, 4, 2, -4, 0, 0, 0, 0, 0, -4, 4]

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