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.

A125225 Numbers n such that n-1 can be represented as a sum of a subset of divisors of n.

Table of values

n a(n)
1 1
2 2
3 4
4 6
5 8
6 12
7 16
8 18
9 20
10 24
11 28
12 30
13 32
14 36
15 40
16 42
17 48
18 54
19 56
20 60
21 64
22 66
23 70
24 72
25 78
26 80
27 84
28 88
29 90
30 96
31 100
32 104
33 108
34 112
35 120
36 126
37 128
38 132
39 140
40 144
41 150
42 156
43 160
44 162
45 168
46 176
47 180
48 192
49 196
50 198
51 200
52 204
53 208
54 210
55 216
56 220
57 224
58 228
59 234
60 240
61 252

List of values

[1, 2, 4, 6, 8, 12, 16, 18, 20, 24, 28, 30, 32, 36, 40, 42, 48, 54, 56, 60, 64, 66, 70, 72, 78, 80, 84, 88, 90, 96, 100, 104, 108, 112, 120, 126, 128, 132, 140, 144, 150, 156, 160, 162, 168, 176, 180, 192, 196, 198, 200, 204, 208, 210, 216, 220, 224, 228, 234, 240, 252]

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

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