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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.

A323136 a(n) is the least power of a prime that n reaches under the map x -> A070229(x), or -1 if we never reach a power of a prime.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 5
6 9
7 7
8 8
9 9
10 25
11 11
12 25
13 13
14 49
15 25
16 16
17 17
18 49
19 19
20 25
21 49
22 121
23 23
24 27
25 25
26 169
27 27
28 49
29 29
30 49
31 31
32 32
33 121
34 289
35 49
36 169
37 37
38 361
39 169
40 121
41 41
42 49
43 43
44 121
45 121
46 529
47 47
48 289
49 49
50 121
51 289
52 169
53 53
54 361
55 121
56 121
57 361
58 841
59 59
60 169
61 61
62 961

List of values

[1, 2, 3, 4, 5, 9, 7, 8, 9, 25, 11, 25, 13, 49, 25, 16, 17, 49, 19, 25, 49, 121, 23, 27, 25, 169, 27, 49, 29, 49, 31, 32, 121, 289, 49, 169, 37, 361, 169, 121, 41, 49, 43, 121, 121, 529, 47, 289, 49, 121, 289, 169, 53, 361, 121, 121, 361, 841, 59, 169, 61, 961]

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

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