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.

A009286 a(n) = lcm(sigma(n), phi(n)).

Table of values

n a(n)
1 1
2 3
3 4
4 14
5 12
6 12
7 24
8 60
9 78
10 36
11 60
12 28
13 84
14 24
15 24
16 248
17 144
18 78
19 180
20 168
21 96
22 180
23 264
24 120
25 620
26 84
27 360
28 168
29 420
30 72
31 480
32 1008
33 240
34 432
35 48
36 1092
37 684
38 180
39 168
40 720
41 840
42 96
43 924
44 420
45 312
46 792
47 1104
48 496
49 798
50 1860
51 288
52 1176
53 1404
54 360
55 360
56 120
57 720
58 1260

List of values

[1, 3, 4, 14, 12, 12, 24, 60, 78, 36, 60, 28, 84, 24, 24, 248, 144, 78, 180, 168, 96, 180, 264, 120, 620, 84, 360, 168, 420, 72, 480, 1008, 240, 432, 48, 1092, 684, 180, 168, 720, 840, 96, 924, 420, 312, 792, 1104, 496, 798, 1860, 288, 1176, 1404, 360, 360, 120, 720, 1260]

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

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