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.

A047077 Number of pairs of integers (x,y) with n^2 <= x^2+y^2 <= (n+1)^2.

Table of values

n a(n)
0 5
1 12
2 20
3 24
4 36
5 44
6 40
7 52
8 60
9 68
10 72
11 68
12 92
13 96
14 100
15 100
16 108
17 120
18 124
19 132
20 128
21 148
22 140
23 144
24 172
25 180
26 180
27 168
28 180
29 204
30 192
31 212
32 204
33 220
34 240
35 212
36 244
37 232
38 268
39 260
40 248
41 276
42 268
43 292
44 288
45 276
46 300
47 296
48 316
49 324
50 348
51 336
52 324
53 348
54 336

List of values

[5, 12, 20, 24, 36, 44, 40, 52, 60, 68, 72, 68, 92, 96, 100, 100, 108, 120, 124, 132, 128, 148, 140, 144, 172, 180, 180, 168, 180, 204, 192, 212, 204, 220, 240, 212, 244, 232, 268, 260, 248, 276, 268, 292, 288, 276, 300, 296, 316, 324, 348, 336, 324, 348, 336]