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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.

A031218 Largest prime power <= n.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 5
6 5
7 7
8 8
9 9
10 9
11 11
12 11
13 13
14 13
15 13
16 16
17 17
18 17
19 19
20 19
21 19
22 19
23 23
24 23
25 25
26 25
27 27
28 27
29 29
30 29
31 31
32 32
33 32
34 32
35 32
36 32
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 49
50 49
51 49
52 49
53 53
54 53
55 53
56 53
57 53
58 53
59 59
60 59
61 61
62 61
63 61
64 64
65 64
66 64
67 67
68 67
69 67
70 67
71 71
72 71

List of values

[1, 2, 3, 4, 5, 5, 7, 8, 9, 9, 11, 11, 13, 13, 13, 16, 17, 17, 19, 19, 19, 19, 23, 23, 25, 25, 27, 27, 29, 29, 31, 32, 32, 32, 32, 32, 37, 37, 37, 37, 41, 41, 43, 43, 43, 43, 47, 47, 49, 49, 49, 49, 53, 53, 53, 53, 53, 53, 59, 59, 61, 61, 61, 64, 64, 64, 67, 67, 67, 67, 71, 71]

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

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