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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.

A014452 Theta series of quadratic form with Gram matrix [ 1, 0, 0; 0, 2, 1; 0, 1, 2 ].

Table of values

n a(n)
0 1
1 2
2 6
3 12
4 2
5 0
6 18
7 12
8 6
9 14
10 12
11 12
12 12
13 0
14 12
15 36
16 2
17 12
18 42
19 12
20 0
21 0
22 24
23 24
24 18
25 14
26 12
27 48
28 12
29 0
30 48
31 12
32 6
33 36
34 12
35 24
36 14
37 0
38 24
39 48
40 12
41 12
42 72
43 36
44 12
45 0
46 24
47 24
48 12
49 14
50 30
51 72
52 0
53 0
54 54
55 24
56 12
57 48
58 36
59 12
60 36
61 0
62 36
63 84
64 2
65 24
66 48
67 36
68 12
69 0
70 24
71 24
72 42
73 24
74 36
75 60
76 12

List of values

[1, 2, 6, 12, 2, 0, 18, 12, 6, 14, 12, 12, 12, 0, 12, 36, 2, 12, 42, 12, 0, 0, 24, 24, 18, 14, 12, 48, 12, 0, 48, 12, 6, 36, 12, 24, 14, 0, 24, 48, 12, 12, 72, 36, 12, 0, 24, 24, 12, 14, 30, 72, 0, 0, 54, 24, 12, 48, 36, 12, 36, 0, 36, 84, 2, 24, 48, 36, 12, 0, 24, 24, 42, 24, 36, 60, 12]

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