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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.

A275273 p - n!, where p is the third smallest prime > n!.

Table of values

n a(n)
1 4
2 5
3 7
4 13
5 17
6 19
7 37
8 37
9 31
10 41
11 19
12 59
13 109
14 71
15 179
16 73
17 59
18 73
19 113
20 53
21 47
22 127
23 149
24 263
25 107
26 241
27 59
28 103
29 317
30 241
31 317
32 113
33 197
34 127
35 109
36 647
37 397
38 67
39 281
40 67
41 211
42 163
43 109
44 107
45 439
46 521
47 709
48 101
49 383
50 337
51 397
52 223
53 337
54 601
55 281
56 311

List of values

[4, 5, 7, 13, 17, 19, 37, 37, 31, 41, 19, 59, 109, 71, 179, 73, 59, 73, 113, 53, 47, 127, 149, 263, 107, 241, 59, 103, 317, 241, 317, 113, 197, 127, 109, 647, 397, 67, 281, 67, 211, 163, 109, 107, 439, 521, 709, 101, 383, 337, 397, 223, 337, 601, 281, 311]