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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.

A260486 Expansion of phi(-x)^2 * phi(-x^6) / phi(-x^3) in powers of x where phi() is a Ramanujan theta function.

Table of values

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

List of values

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

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