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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.

A007369 Numbers n such that sigma(x) = n has no solution.

Table of values

n a(n)
1 2
2 5
3 9
4 10
5 11
6 16
7 17
8 19
9 21
10 22
11 23
12 25
13 26
14 27
15 29
16 33
17 34
18 35
19 37
20 41
21 43
22 45
23 46
24 47
25 49
26 50
27 51
28 52
29 53
30 55
31 58
32 59
33 61
34 64
35 65
36 66
37 67
38 69
39 70
40 71
41 73
42 75
43 76
44 77
45 79
46 81
47 82
48 83
49 85
50 86
51 87
52 88
53 89
54 92
55 94
56 95
57 97
58 99
59 100
60 101
61 103
62 105
63 106
64 107
65 109
66 111
67 113

List of values

[2, 5, 9, 10, 11, 16, 17, 19, 21, 22, 23, 25, 26, 27, 29, 33, 34, 35, 37, 41, 43, 45, 46, 47, 49, 50, 51, 52, 53, 55, 58, 59, 61, 64, 65, 66, 67, 69, 70, 71, 73, 75, 76, 77, 79, 81, 82, 83, 85, 86, 87, 88, 89, 92, 94, 95, 97, 99, 100, 101, 103, 105, 106, 107, 109, 111, 113]

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

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