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.

A180152 Numbers k such that the sum of the first k semiprimes is a prime.

Table of values

n a(n)
1 3
2 4
3 5
4 7
5 8
6 15
7 21
8 22
9 37
10 56
11 59
12 62
13 82
14 85
15 89
16 91
17 114
18 119
19 121
20 129
21 139
22 146
23 168
24 169
25 189
26 195
27 197
28 214
29 227
30 258
31 286
32 295
33 312
34 333
35 341
36 352
37 360
38 361
39 387
40 400
41 419
42 426
43 434
44 437
45 440
46 466
47 470
48 483
49 495
50 497
51 504
52 556
53 595
54 610
55 619
56 629
57 636

List of values

[3, 4, 5, 7, 8, 15, 21, 22, 37, 56, 59, 62, 82, 85, 89, 91, 114, 119, 121, 129, 139, 146, 168, 169, 189, 195, 197, 214, 227, 258, 286, 295, 312, 333, 341, 352, 360, 361, 387, 400, 419, 426, 434, 437, 440, 466, 470, 483, 495, 497, 504, 556, 595, 610, 619, 629, 636]