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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.

A386926 a(n) = denominator(Sum_{k=1..n} d(k+1)/d(k)), where d is the number of divisors function.

Table of values

n a(n)
1 1
2 1
3 2
4 6
5 6
6 3
7 3
8 12
9 4
10 4
11 4
12 12
13 12
14 12
15 6
16 30
17 30
18 30
19 30
20 30
21 30
22 15
23 15
24 120
25 120
26 120
27 120
28 40
29 40
30 40
31 40
32 120
33 120
34 120
35 120
36 360
37 360
38 360
39 360
40 360
41 360
42 360
43 360
44 360
45 360
46 360
47 360
48 360
49 360
50 360
51 360
52 360
53 360
54 360
55 360
56 360
57 360
58 360
59 360
60 360
61 360

List of values

[1, 1, 2, 6, 6, 3, 3, 12, 4, 4, 4, 12, 12, 12, 6, 30, 30, 30, 30, 30, 30, 15, 15, 120, 120, 120, 120, 40, 40, 40, 40, 120, 120, 120, 120, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, 360]

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

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