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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.

A074753 Number of integers k such that sigma(k) < n.

Table of values

n a(n)
1 0
2 1
3 1
4 2
5 3
6 3
7 4
8 5
9 6
10 6
11 6
12 6
13 8
14 9
15 10
16 11
17 11
18 11
19 13
20 13
21 14
22 14
23 14
24 14
25 17
26 17
27 17
28 17
29 18
30 18
31 19
32 21
33 23
34 23
35 23
36 23
37 24
38 24
39 25
40 26
41 27
42 27
43 30
44 30
45 31
46 31
47 31
48 31
49 34
50 34
51 34
52 34
53 34
54 34
55 36
56 36
57 38
58 39
59 39
60 39
61 42
62 42
63 43
64 44
65 44
66 44
67 44
68 44
69 45
70 45
71 45
72 45
73 50
74 50

List of values

[0, 1, 1, 2, 3, 3, 4, 5, 6, 6, 6, 6, 8, 9, 10, 11, 11, 11, 13, 13, 14, 14, 14, 14, 17, 17, 17, 17, 18, 18, 19, 21, 23, 23, 23, 23, 24, 24, 25, 26, 27, 27, 30, 30, 31, 31, 31, 31, 34, 34, 34, 34, 34, 34, 36, 36, 38, 39, 39, 39, 42, 42, 43, 44, 44, 44, 44, 44, 45, 45, 45, 45, 50, 50]

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

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