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.

A125215 Semiprimes s such that s-/+2 are primes.

Table of values

n a(n)
1 9
2 15
3 21
4 39
5 69
6 111
7 129
8 309
9 381
10 489
11 501
12 771
13 879
14 939
15 1011
16 1299
17 1569
18 2271
19 2391
20 2661
21 2859
22 3039
23 3189
24 3459
25 3849
26 3909
27 3921
28 4449
29 4791
30 4971
31 5001
32 5079
33 5169
34 5349
35 5739
36 6009
37 6999
38 7041
39 7671
40 8691
41 8781
42 9201
43 10599
44 11469
45 11829

List of values

[9, 15, 21, 39, 69, 111, 129, 309, 381, 489, 501, 771, 879, 939, 1011, 1299, 1569, 2271, 2391, 2661, 2859, 3039, 3189, 3459, 3849, 3909, 3921, 4449, 4791, 4971, 5001, 5079, 5169, 5349, 5739, 6009, 6999, 7041, 7671, 8691, 8781, 9201, 10599, 11469, 11829]