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.

A162938 A 2-based alternate sum over the numbers from 0 to the n-th nonprime.

Table of values

n a(n)
1 2
2 5
3 8
4 11
5 14
6 25
7 17
8 20
9 23
10 40
11 26
12 29
13 32
14 55
15 35
16 38
17 65
18 41
19 70
20 44
21 47
22 50
23 85
24 53
25 90
26 56
27 59
28 100
29 62
30 65
31 68
32 115
33 71
34 74
35 125
36 77
37 130
38 80
39 83
40 140
41 86
42 145
43 89
44 92
45 95
46 160
47 98
48 165
49 101
50 104
51 175
52 107
53 110
54 113
55 190
56 116
57 195
58 119
59 122
60 205
61 125
62 128
63 215

List of values

[2, 5, 8, 11, 14, 25, 17, 20, 23, 40, 26, 29, 32, 55, 35, 38, 65, 41, 70, 44, 47, 50, 85, 53, 90, 56, 59, 100, 62, 65, 68, 115, 71, 74, 125, 77, 130, 80, 83, 140, 86, 145, 89, 92, 95, 160, 98, 165, 101, 104, 175, 107, 110, 113, 190, 116, 195, 119, 122, 205, 125, 128, 215]