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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.

A324991 a(n) = the largest number k such that floor(sigma(k)/tau(k)) = n, or 0 if no such number k exists.

Table of values

n a(n)
1 2
2 4
3 8
4 12
5 0
6 18
7 24
8 21
9 30
10 36
11 40
12 48
13 45
14 60
15 56
16 72
17 63
18 84
19 90
20 75
21 96
22 120
23 108
24 112
25 0
26 144
27 110
28 140
29 0
30 180
31 160
32 156
33 136
34 67
35 116
36 210
37 240
38 200
39 198
40 252
41 175
42 224
43 208
44 225
45 288
46 228
47 0
48 360
49 336
50 0
51 172
52 315
53 0
54 330
55 272
56 420
57 294
58 306
59 0
60 396

List of values

[2, 4, 8, 12, 0, 18, 24, 21, 30, 36, 40, 48, 45, 60, 56, 72, 63, 84, 90, 75, 96, 120, 108, 112, 0, 144, 110, 140, 0, 180, 160, 156, 136, 67, 116, 210, 240, 200, 198, 252, 175, 224, 208, 225, 288, 228, 0, 360, 336, 0, 172, 315, 0, 330, 272, 420, 294, 306, 0, 396]

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

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