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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.

A152075 a(n) = the smallest prime p > prime(n) such that p - prime(n) is squarefree, where prime(n) is the n-th prime.

Table of values

n a(n)
1 3
2 5
3 7
4 13
5 13
6 19
7 19
8 29
9 29
10 31
11 37
12 43
13 43
14 53
15 53
16 59
17 61
18 67
19 73
20 73
21 79
22 89
23 89
24 103
25 103
26 103
27 109
28 109
29 131
30 127
31 137
32 137
33 139
34 149
35 151
36 157
37 163
38 173
39 173
40 179
41 181
42 191
43 193
44 199
45 199
46 229
47 233
48 229
49 229
50 239
51 239
52 241
53 251
54 257
55 263
56 269
57 271
58 277

List of values

[3, 5, 7, 13, 13, 19, 19, 29, 29, 31, 37, 43, 43, 53, 53, 59, 61, 67, 73, 73, 79, 89, 89, 103, 103, 103, 109, 109, 131, 127, 137, 137, 139, 149, 151, 157, 163, 173, 173, 179, 181, 191, 193, 199, 199, 229, 233, 229, 229, 239, 239, 241, 251, 257, 263, 269, 271, 277]

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

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