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.

A174838 Numbers n such that semiprime(n)+1 is prime, where semiprime(n) is A001358.

Table of values

n a(n)
1 1
2 2
3 4
4 8
5 16
6 21
7 27
8 35
9 55
10 58
11 76
12 84
13 111
14 113
15 120
16 143
17 147
18 155
19 176
20 183
21 218
22 252
23 258
24 265
25 294
26 304
27 348
28 377
29 383
30 387
31 403
32 424
33 435
34 444
35 464
36 525
37 548
38 582
39 585
40 593
41 600
42 633
43 690
44 694
45 732
46 787
47 803
48 810
49 827
50 841
51 846
52 877
53 892
54 900
55 971

List of values

[1, 2, 4, 8, 16, 21, 27, 35, 55, 58, 76, 84, 111, 113, 120, 143, 147, 155, 176, 183, 218, 252, 258, 265, 294, 304, 348, 377, 383, 387, 403, 424, 435, 444, 464, 525, 548, 582, 585, 593, 600, 633, 690, 694, 732, 787, 803, 810, 827, 841, 846, 877, 892, 900, 971]