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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.

A235109 Averages q of twin prime pairs, such that q concatenated to q is also the average of a twin prime pair.

Table of values

n a(n)
1 42
2 102
3 108
4 180
5 192
6 270
7 312
8 420
9 522
10 660
11 822
12 882
13 1230
14 1482
15 4242
16 4788
17 8820
18 10332
19 11550
20 13692
21 14550
22 14562
23 14868
24 15732
25 17910
26 18522
27 20550
28 21648
29 22620
30 23670
31 23832
32 26262
33 27738
34 35838
35 38922
36 39042
37 40128
38 42018
39 43962
40 44532
41 46440

List of values

[42, 102, 108, 180, 192, 270, 312, 420, 522, 660, 822, 882, 1230, 1482, 4242, 4788, 8820, 10332, 11550, 13692, 14550, 14562, 14868, 15732, 17910, 18522, 20550, 21648, 22620, 23670, 23832, 26262, 27738, 35838, 38922, 39042, 40128, 42018, 43962, 44532, 46440]

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

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