cp's OEIS Frontend

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.

A319605 a(1) = 1, and for n > 1, a(n) is the least prime power of the form p^k >= n where p is a prime factor of n.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 5
6 8
7 7
8 8
9 9
10 16
11 11
12 16
13 13
14 16
15 25
16 16
17 17
18 27
19 19
20 25
21 27
22 32
23 23
24 27
25 25
26 32
27 27
28 32
29 29
30 32
31 31
32 32
33 81
34 64
35 49
36 64
37 37
38 64
39 81
40 64
41 41
42 49
43 43
44 64
45 81
46 64
47 47
48 64
49 49
50 64
51 81
52 64
53 53
54 64
55 121
56 64
57 81
58 64
59 59
60 64
61 61
62 64
63 81
64 64
65 125
66 81
67 67

List of values

[1, 2, 3, 4, 5, 8, 7, 8, 9, 16, 11, 16, 13, 16, 25, 16, 17, 27, 19, 25, 27, 32, 23, 27, 25, 32, 27, 32, 29, 32, 31, 32, 81, 64, 49, 64, 37, 64, 81, 64, 41, 49, 43, 64, 81, 64, 47, 64, 49, 64, 81, 64, 53, 64, 121, 64, 81, 64, 59, 64, 61, 64, 81, 64, 125, 81, 67]

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

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