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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.

A257921 Expansion of f(x^2, -x^4) * f(-x, -x^5)^2 / f(-x^12, -x^12) in powers of x where f(, ) is Ramanujan's general theta functions.

Table of values

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

List of values

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

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