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.

A243289 n minus the index of the greatest prime dividing n-th squarefree number: a(n) = n - A243290(n).

Table of values

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

List of values

[1, 1, 1, 1, 3, 2, 4, 3, 3, 6, 8, 5, 5, 10, 10, 7, 11, 8, 16, 9, 16, 15, 19, 12, 17, 20, 14, 24, 15, 21, 16, 25, 17, 29, 27, 26, 20, 20, 28, 34, 36, 23, 34, 40, 25, 25, 35, 43, 43, 28, 38, 29, 46, 40, 45, 32, 51, 47, 44, 52, 36, 36, 56, 37, 61, 50, 39, 39, 64, 58]

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

Content is available under The OEIS End-User License Agreement.