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.

A005153 Practical numbers: positive integers m such that every k <= sigma(m) is a sum of distinct divisors of m. Also called panarithmic numbers.

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 72
24 78
25 80
26 84
27 88
28 90
29 96
30 100
31 104
32 108
33 112
34 120
35 126
36 128
37 132
38 140
39 144
40 150
41 156
42 160
43 162
44 168
45 176
46 180
47 192
48 196
49 198
50 200
51 204
52 208
53 210
54 216
55 220
56 224
57 228
58 234
59 240
60 252

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, 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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