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.

A342173 a(n) = Sum_{j=1..n-1} floor(prime(n)/prime(j)).

Table of values

n a(n)
1 0
2 1
3 3
4 6
5 11
6 14
7 20
8 23
9 30
10 39
11 43
12 53
13 60
14 64
15 71
16 81
17 92
18 96
19 107
20 115
21 118
22 130
23 136
24 148
25 164
26 171
27 175
28 183
29 186
30 194
31 222
32 229
33 241
34 245
35 265
36 269
37 282
38 293
39 301
40 313
41 325
42 329
43 351
44 354
45 362
46 366
47 392
48 417
49 424
50 428
51 437
52 450
53 454
54 473
55 485
56 498
57 511

List of values

[0, 1, 3, 6, 11, 14, 20, 23, 30, 39, 43, 53, 60, 64, 71, 81, 92, 96, 107, 115, 118, 130, 136, 148, 164, 171, 175, 183, 186, 194, 222, 229, 241, 245, 265, 269, 282, 293, 301, 313, 325, 329, 351, 354, 362, 366, 392, 417, 424, 428, 437, 450, 454, 473, 485, 498, 511]