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.

A340060 Averages k of twin primes such that the sum (with multiplicity) of prime factors of k-1, k and k+1 is prime.

Table of values

n a(n)
1 6
2 12
3 108
4 420
5 432
6 462
7 1020
8 1290
9 1302
10 1428
11 1482
12 2088
13 3120
14 3468
15 3540
16 4092
17 4242
18 5280
19 5652
20 5850
21 5868
22 6690
23 7332
24 8820
25 9420
26 9462
27 9930
28 10038
29 10092
30 11118
31 11832
32 11940
33 14628
34 16140
35 16362
36 17208
37 17388
38 17682
39 18042
40 18312
41 20640
42 20772
43 22278
44 22962
45 23028
46 23202
47 25848

List of values

[6, 12, 108, 420, 432, 462, 1020, 1290, 1302, 1428, 1482, 2088, 3120, 3468, 3540, 4092, 4242, 5280, 5652, 5850, 5868, 6690, 7332, 8820, 9420, 9462, 9930, 10038, 10092, 11118, 11832, 11940, 14628, 16140, 16362, 17208, 17388, 17682, 18042, 18312, 20640, 20772, 22278, 22962, 23028, 23202, 25848]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.