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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.

A139171 a(n) = smallest prime number p such that p!/n is an integer.

Table of values

n a(n)
1 2
2 2
3 3
4 5
5 5
6 3
7 7
8 5
9 7
10 5
11 11
12 5
13 13
14 7
15 5
16 7
17 17
18 7
19 19
20 5
21 7
22 11
23 23
24 5
25 11
26 13
27 11
28 7
29 29
30 5
31 31
32 11
33 11
34 17
35 7
36 7
37 37
38 19
39 13
40 5
41 41
42 7
43 43
44 11
45 7
46 23
47 47
48 7
49 17
50 11
51 17
52 13
53 53
54 11
55 11
56 7
57 19
58 29
59 59
60 5
61 61
62 31
63 7
64 11
65 13
66 11
67 67
68 17
69 23
70 7
71 71
72 7
73 73
74 37
75 11
76 19
77 11
78 13
79 79
80 7
81 11

List of values

[2, 2, 3, 5, 5, 3, 7, 5, 7, 5, 11, 5, 13, 7, 5, 7, 17, 7, 19, 5, 7, 11, 23, 5, 11, 13, 11, 7, 29, 5, 31, 11, 11, 17, 7, 7, 37, 19, 13, 5, 41, 7, 43, 11, 7, 23, 47, 7, 17, 11, 17, 13, 53, 11, 11, 7, 19, 29, 59, 5, 61, 31, 7, 11, 13, 11, 67, 17, 23, 7, 71, 7, 73, 37, 11, 19, 11, 13, 79, 7, 11]

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