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.

A167427 Largest non-isolated nonprime < n-th non-isolated (or twin) prime.

Table of values

n a(n)
1 1
2 1
3 1
4 10
5 10
6 16
7 16
8 28
9 28
10 40
11 40
12 58
13 58
14 70
15 70
16 100
17 100
18 106
19 106
20 136
21 136
22 148
23 148
24 178
25 178
26 190
27 190
28 196
29 196
30 226
31 226
32 238
33 238
34 268
35 268
36 280
37 280
38 310
39 310
40 346
41 346
42 418
43 418
44 430
45 430
46 460
47 460
48 520
49 520
50 568
51 568
52 598
53 598
54 616
55 616
56 640

List of values

[1, 1, 1, 10, 10, 16, 16, 28, 28, 40, 40, 58, 58, 70, 70, 100, 100, 106, 106, 136, 136, 148, 148, 178, 178, 190, 190, 196, 196, 226, 226, 238, 238, 268, 268, 280, 280, 310, 310, 346, 346, 418, 418, 430, 430, 460, 460, 520, 520, 568, 568, 598, 598, 616, 616, 640]