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.

A256381 Numbers n such that n-3 and n+3 are semiprimes.

Table of values

n a(n)
1 7
2 12
3 18
4 36
5 52
6 54
7 88
8 90
9 118
10 126
11 158
12 180
13 206
14 212
15 216
16 218
17 250
18 256
19 262
20 292
21 298
22 302
23 306
24 324
25 326
26 332
27 338
28 358
29 368
30 374
31 410
32 414
33 448
34 450
35 508
36 514
37 530
38 532
39 540
40 548
41 556
42 562
43 576
44 586
45 594
46 626
47 632
48 652
49 682
50 684
51 692
52 700
53 710
54 720

List of values

[7, 12, 18, 36, 52, 54, 88, 90, 118, 126, 158, 180, 206, 212, 216, 218, 250, 256, 262, 292, 298, 302, 306, 324, 326, 332, 338, 358, 368, 374, 410, 414, 448, 450, 508, 514, 530, 532, 540, 548, 556, 562, 576, 586, 594, 626, 632, 652, 682, 684, 692, 700, 710, 720]