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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.

A107503 Theta series of quadratic form with Gram matrix [ 8, 1, 1, -1; 1, 18, 5, 8; 1, 5, 18, 8; -1, 8, 8, 18].

Table of values

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

List of values

[1, 0, 0, 0, 2, 0, 0, 0, 0, 6, 4, 0, 10, 2, 6, 0, 8, 6, 0, 0, 0, 0, 8, 10, 0, 6, 6, 14, 0, 14, 20, 0, 0, 0, 0, 10, 24, 0, 16, 8, 28, 0, 28, 8, 0, 0, 0, 0, 34, 16, 0, 18, 14, 8, 0, 18, 40, 0, 0, 0, 0, 22, 26, 0, 40, 12, 44, 0, 38, 28, 0, 0, 0, 0, 36, 38, 0, 30]

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