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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.

A089730 Greatest prime factor of all differences prime(n)-q, q prime and q a(1)=0.

Table of values

n a(n)
1 0
2 1
3 3
4 5
5 3
6 11
7 7
8 17
9 7
10 13
11 29
12 17
13 19
14 41
15 17
16 23
17 23
18 59
19 31
20 29
21 71
22 37
23 23
24 43
25 47
26 47
27 101
28 47
29 107
30 53
31 61
32 59
33 67
34 137
35 73
36 149
37 73
38 79
39 53
40 83
41 83
42 179
43 89
44 191
45 97
46 197
47 103
48 109
49 107
50 227
51 113
52 113
53 239
54 107
55 127
56 113
57 131
58 269
59 137
60 139
61 281
62 137

List of values

[0, 1, 3, 5, 3, 11, 7, 17, 7, 13, 29, 17, 19, 41, 17, 23, 23, 59, 31, 29, 71, 37, 23, 43, 47, 47, 101, 47, 107, 53, 61, 59, 67, 137, 73, 149, 73, 79, 53, 83, 83, 179, 89, 191, 97, 197, 103, 109, 107, 227, 113, 113, 239, 107, 127, 113, 131, 269, 137, 139, 281, 137]

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

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