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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.

A320164 Number of integer solutions to a^2 + 2*b^2 + 5*c^2 + 7*d^2 = n.

Table of values

n a(n)
0 1
1 2
2 2
3 4
4 2
5 2
6 8
7 6
8 14
9 14
10 8
11 16
12 8
13 20
14 20
15 20
16 30
17 12
18 30
19 12
20 10
21 32
22 16
23 40
24 40
25 14
26 16
27 20
28 22
29 56
30 48
31 48
32 34
33 28
34 52
35 16
36 70
37 40
38 48
39 92
40 24
41 32
42 32
43 32
44 56
45 94
46 56
47 28
48 56
49 46
50 58
51 80
52 48
53 56
54 88
55 76
56 72
57 60
58 48
59 44
60 108
61 92
62 40
63 94
64 82
65 44
66 120
67 48
68 40

List of values

[1, 2, 2, 4, 2, 2, 8, 6, 14, 14, 8, 16, 8, 20, 20, 20, 30, 12, 30, 12, 10, 32, 16, 40, 40, 14, 16, 20, 22, 56, 48, 48, 34, 28, 52, 16, 70, 40, 48, 92, 24, 32, 32, 32, 56, 94, 56, 28, 56, 46, 58, 80, 48, 56, 88, 76, 72, 60, 48, 44, 108, 92, 40, 94, 82, 44, 120, 48, 40]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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