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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.

A127019 a(n) is the least semiprime s such that s - 2*n is also a semiprime.

Table of values

n a(n)
1 6
2 10
3 10
4 14
5 14
6 21
7 35
8 22
9 22
10 26
11 26
12 33
13 35
14 34
15 34
16 38
17 38
18 46
19 77
20 46
21 46
22 58
23 55
24 57
25 65
26 58
27 58
28 62
29 62
30 69
31 77
32 74
33 87
34 74
35 74
36 82
37 95
38 82
39 82
40 86
41 86
42 93
43 95
44 94
45 94
46 106
47 115
48 106
49 119
50 106
51 106
52 118
53 115
54 118
55 119
56 118
57 118
58 122
59 122
60 129
61 143
62 133
63 141
64 134

List of values

[6, 10, 10, 14, 14, 21, 35, 22, 22, 26, 26, 33, 35, 34, 34, 38, 38, 46, 77, 46, 46, 58, 55, 57, 65, 58, 58, 62, 62, 69, 77, 74, 87, 74, 74, 82, 95, 82, 82, 86, 86, 93, 95, 94, 94, 106, 115, 106, 119, 106, 106, 118, 115, 118, 119, 118, 118, 122, 122, 129, 143, 133, 141, 134]

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

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