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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.

A152076 a(n) = the largest prime p < prime(n) such that prime(n) - p is squarefree, where prime(n) is the n-th prime. a(n) = 0 if no such prime p exists.

Table of values

n a(n)
2 2
3 3
4 5
5 5
6 11
7 11
8 17
9 17
10 23
11 29
12 31
13 31
14 41
15 41
16 47
17 53
18 59
19 61
20 61
21 71
22 73
23 73
24 83
25 83
26 79
27 101
28 101
29 107
30 107
31 113
32 109
33 131
34 137
35 139
36 149
37 151
38 157
39 157
40 167
41 173
42 179
43 181
44 191
45 191
46 197
47 197
48 197
49 197
50 227
51 227
52 233
53 239
54 241
55 251
56 257
57 263
58 269
59 271
60 271

List of values

[2, 3, 5, 5, 11, 11, 17, 17, 23, 29, 31, 31, 41, 41, 47, 53, 59, 61, 61, 71, 73, 73, 83, 83, 79, 101, 101, 107, 107, 113, 109, 131, 137, 139, 149, 151, 157, 157, 167, 173, 179, 181, 191, 191, 197, 197, 197, 197, 227, 227, 233, 239, 241, 251, 257, 263, 269, 271, 271]

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

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