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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.

A069345 n minus the number of its prime-factors: a(n) = n - A001222(n).

Table of values

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

List of values

[1, 1, 2, 2, 4, 4, 6, 5, 7, 8, 10, 9, 12, 12, 13, 12, 16, 15, 18, 17, 19, 20, 22, 20, 23, 24, 24, 25, 28, 27, 30, 27, 31, 32, 33, 32, 36, 36, 37, 36, 40, 39, 42, 41, 42, 44, 46, 43, 47, 47, 49, 49, 52, 50, 53, 52, 55, 56, 58, 56, 60, 60, 60, 58, 63, 63, 66, 65]

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

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