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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.

A079788 a(n) = count of numbers <= n for which the number of divisors is also <= tau(n).

Table of values

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

List of values

[1, 2, 3, 4, 4, 6, 5, 8, 7, 10, 6, 12, 7, 13, 14, 15, 8, 18, 9, 20, 17, 18, 10, 24, 13, 21, 22, 27, 11, 30, 12, 30, 25, 26, 27, 36, 13, 29, 30, 39, 14, 41, 15, 39, 40, 33, 16, 48, 20, 44, 36, 46, 17, 52, 38, 54, 39, 40, 18, 60, 19, 43, 54, 55, 44, 63, 20, 57, 46, 67, 21, 72, 22, 49]

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

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