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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.

A372613 Number of solutions to x^2 + y^2 + z^2 + w^2 <= n, where x, y, z, w are positive odd integers.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 1
5 1
6 1
7 1
8 1
9 1
10 1
11 1
12 5
13 5
14 5
15 5
16 5
17 5
18 5
19 5
20 11
21 11
22 11
23 11
24 11
25 11
26 11
27 11
28 19
29 19
30 19
31 19
32 19
33 19
34 19
35 19
36 32
37 32
38 32
39 32
40 32
41 32
42 32
43 32
44 44
45 44
46 44
47 44
48 44
49 44
50 44
51 44
52 58
53 58
54 58
55 58
56 58
57 58
58 58
59 58
60 82
61 82
62 82
63 82
64 82
65 82
66 82
67 82
68 100
69 100
70 100
71 100
72 100
73 100
74 100
75 100

List of values

[0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 5, 5, 5, 5, 5, 5, 11, 11, 11, 11, 11, 11, 11, 11, 19, 19, 19, 19, 19, 19, 19, 19, 32, 32, 32, 32, 32, 32, 32, 32, 44, 44, 44, 44, 44, 44, 44, 44, 58, 58, 58, 58, 58, 58, 58, 58, 82, 82, 82, 82, 82, 82, 82, 82, 100, 100, 100, 100, 100, 100, 100, 100]

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