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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.

A167185 Largest prime power <= n that is not prime.

Table of values

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

List of values

[1, 1, 1, 4, 4, 4, 4, 8, 9, 9, 9, 9, 9, 9, 9, 16, 16, 16, 16, 16, 16, 16, 16, 16, 25, 25, 27, 27, 27, 27, 27, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64]

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

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