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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.

A229998 Denominator of d(k)/d(1) + d(k-1)/d(2) + ... + d(k)/d(1), where d(1),d(2),...,d(k) are the unitary divisors of n.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 5
6 3
7 7
8 8
9 9
10 1
11 11
12 6
13 13
14 7
15 3
16 16
17 17
18 9
19 19
20 10
21 21
22 11
23 23
24 12
25 25
26 13
27 27
28 14
29 29
30 3
31 31
32 32
33 33
34 17
35 7
36 18
37 37
38 19
39 39
40 4
41 41
42 21
43 43
44 22
45 45
46 23
47 47
48 24
49 49
50 5
51 51
52 26
53 53
54 27
55 55
56 28
57 57
58 29
59 59
60 3
61 61
62 31
63 63
64 64
65 1
66 33
67 67
68 2
69 69
70 7

List of values

[1, 2, 3, 4, 5, 3, 7, 8, 9, 1, 11, 6, 13, 7, 3, 16, 17, 9, 19, 10, 21, 11, 23, 12, 25, 13, 27, 14, 29, 3, 31, 32, 33, 17, 7, 18, 37, 19, 39, 4, 41, 21, 43, 22, 45, 23, 47, 24, 49, 5, 51, 26, 53, 27, 55, 28, 57, 29, 59, 3, 61, 31, 63, 64, 1, 33, 67, 2, 69, 7]

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

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