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.

A127565 Floor (sum_{k=1..n} log(log(prime(k)))).

Table of values

n a(n)
1 -1
2 -1
3 0
4 0
5 1
6 2
7 3
8 4
9 5
10 7
11 8
12 9
13 10
14 12
15 13
16 15
17 16
18 17
19 19
20 20
21 22
22 23
23 25
24 26
25 28
26 29
27 31
28 32
29 34
30 35
31 37
32 39
33 40
34 42
35 43
36 45
37 47
38 48
39 50
40 51
41 53
42 55
43 56
44 58
45 60
46 61
47 63
48 65
49 66
50 68
51 70
52 72
53 73
54 75
55 77
56 78
57 80
58 82
59 84
60 85
61 87
62 89
63 91
64 92
65 94
66 96
67 98
68 99
69 101
70 103
71 105
72 106
73 108
74 110
75 112
76 113
77 115
78 117
79 119
80 121
81 122
82 124
83 126

List of values

[-1, -1, 0, 0, 1, 2, 3, 4, 5, 7, 8, 9, 10, 12, 13, 15, 16, 17, 19, 20, 22, 23, 25, 26, 28, 29, 31, 32, 34, 35, 37, 39, 40, 42, 43, 45, 47, 48, 50, 51, 53, 55, 56, 58, 60, 61, 63, 65, 66, 68, 70, 72, 73, 75, 77, 78, 80, 82, 84, 85, 87, 89, 91, 92, 94, 96, 98, 99, 101, 103, 105, 106, 108, 110, 112, 113, 115, 117, 119, 121, 122, 124, 126]