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.

A070072 Number of distinct rectangles with integer sides <= n and squarefree area.

Table of values

n a(n)
1 1
2 2
3 4
4 4
5 7
6 9
7 14
8 14
9 14
10 17
11 24
12 24
13 32
14 37
15 43
16 43
17 54
18 54
19 66
20 66
21 74
22 83
23 98
24 98
25 98
26 108
27 108
28 108
29 125
30 133
31 152
32 152
33 165
34 178
35 193
36 193
37 216
38 231
39 248
40 248
41 274
42 285
43 313
44 313
45 313
46 331
47 361
48 361
49 361
50 361
51 382
52 382
53 414

List of values

[1, 2, 4, 4, 7, 9, 14, 14, 14, 17, 24, 24, 32, 37, 43, 43, 54, 54, 66, 66, 74, 83, 98, 98, 98, 108, 108, 108, 125, 133, 152, 152, 165, 178, 193, 193, 216, 231, 248, 248, 274, 285, 313, 313, 313, 331, 361, 361, 361, 361, 382, 382, 414]