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.

A220506 Number of primes <= n-th quarter-square.

Table of values

n a(n)
1 0
2 0
3 1
4 2
5 3
6 4
7 5
8 6
9 8
10 9
11 10
12 11
13 13
14 15
15 16
16 18
17 20
18 22
19 24
20 25
21 29
22 30
23 32
24 34
25 36
26 39
27 42
28 44
29 46
30 48
31 52
32 54
33 58
34 61
35 62
36 66
37 68
38 72
39 75
40 78
41 81
42 85
43 89
44 92
45 96
46 99
47 101
48 105
49 109
50 114
51 118
52 122
53 126
54 129
55 133
56 137
57 141
58 146
59 150
60 154
61 158
62 162
63 167
64 172
65 177
66 181
67 187
68 191
69 195
70 200

List of values

[0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 13, 15, 16, 18, 20, 22, 24, 25, 29, 30, 32, 34, 36, 39, 42, 44, 46, 48, 52, 54, 58, 61, 62, 66, 68, 72, 75, 78, 81, 85, 89, 92, 96, 99, 101, 105, 109, 114, 118, 122, 126, 129, 133, 137, 141, 146, 150, 154, 158, 162, 167, 172, 177, 181, 187, 191, 195, 200]