cp's OEIS Frontend

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.

A046109 Number of lattice points (x,y) on the circumference of a circle of radius n with center at (0,0).

Table of values

n a(n)
0 1
1 4
2 4
3 4
4 4
5 12
6 4
7 4
8 4
9 4
10 12
11 4
12 4
13 12
14 4
15 12
16 4
17 12
18 4
19 4
20 12
21 4
22 4
23 4
24 4
25 20
26 12
27 4
28 4
29 12
30 12
31 4
32 4
33 4
34 12
35 12
36 4
37 12
38 4
39 12
40 12
41 12
42 4
43 4
44 4
45 12
46 4
47 4
48 4
49 4
50 20
51 12
52 12
53 12
54 4
55 12
56 4
57 4
58 12
59 4
60 12
61 12
62 4
63 4
64 4
65 36
66 4
67 4
68 12
69 4
70 12
71 4
72 4
73 12
74 12
75 20
76 4
77 4
78 12
79 4
80 12
81 4
82 12
83 4
84 4
85 36

List of values

[1, 4, 4, 4, 4, 12, 4, 4, 4, 4, 12, 4, 4, 12, 4, 12, 4, 12, 4, 4, 12, 4, 4, 4, 4, 20, 12, 4, 4, 12, 12, 4, 4, 4, 12, 12, 4, 12, 4, 12, 12, 12, 4, 4, 4, 12, 4, 4, 4, 4, 20, 12, 12, 12, 4, 12, 4, 4, 12, 4, 12, 12, 4, 4, 4, 36, 4, 4, 12, 4, 12, 4, 4, 12, 12, 20, 4, 4, 12, 4, 12, 4, 12, 4, 4, 36]