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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.

A320908 Expansion of Product_{k>=1} theta_4(x^k), where theta_4() is the Jacobi theta function.

Table of values

n a(n)
0 1
1 -2
2 -2
3 2
4 4
5 6
6 -6
7 -2
8 -8
9 -12
10 2
11 6
12 20
13 14
14 22
15 -2
16 -14
17 -34
18 -20
19 -42
20 -48
21 34
22 10
23 50
24 48
25 80
26 82
27 52
28 -16
29 -30
30 -142
31 -130
32 -138
33 -226
34 -54
35 -70
36 80
37 190
38 310
39 238
40 392
41 178
42 178
43 86
44 -40
45 -148
46 -582
47 -506
48 -546
49 -680
50 -656
51 -126
52 -336
53 262
54 428
55 930

List of values

[1, -2, -2, 2, 4, 6, -6, -2, -8, -12, 2, 6, 20, 14, 22, -2, -14, -34, -20, -42, -48, 34, 10, 50, 48, 80, 82, 52, -16, -30, -142, -130, -138, -226, -54, -70, 80, 190, 310, 238, 392, 178, 178, 86, -40, -148, -582, -506, -546, -680, -656, -126, -336, 262, 428, 930]