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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.

A064220 Least k such that k*11^n +/- 1 are twin primes.

Table of values

n a(n)
0 4
1 18
2 12
3 12
4 120
5 168
6 72
7 78
8 810
9 312
10 90
11 138
12 270
13 948
14 408
15 192
16 960
17 1920
18 738
19 4698
20 810
21 1872
22 6978
23 2058
24 3222
25 570
26 870
27 390
28 9708
29 14118
30 9378
31 6822
32 8730
33 2250
34 1008
35 8052
36 732
37 5400
38 2910
39 5982
40 2688
41 16758
42 1908
43 258
44 762
45 1488
46 12678

List of values

[4, 18, 12, 12, 120, 168, 72, 78, 810, 312, 90, 138, 270, 948, 408, 192, 960, 1920, 738, 4698, 810, 1872, 6978, 2058, 3222, 570, 870, 390, 9708, 14118, 9378, 6822, 8730, 2250, 1008, 8052, 732, 5400, 2910, 5982, 2688, 16758, 1908, 258, 762, 1488, 12678]

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

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