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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.

A007917 Version 1 of the "previous prime" function: largest prime <= n.

Table of values

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

List of values

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

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

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