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.

A327668 a(n) = n * Sum_{d|n} (-1)^(bigomega(d) - omega(d)) / d.

Table of values

n a(n)
1 1
2 3
3 4
4 5
5 6
6 12
7 8
8 11
9 11
10 18
11 12
12 20
13 14
14 24
15 24
16 21
17 18
18 33
19 20
20 30
21 32
22 36
23 24
24 44
25 29
26 42
27 34
28 40
29 30
30 72
31 32
32 43
33 48
34 54
35 48
36 55
37 38
38 60
39 56
40 66
41 42
42 96
43 44
44 60
45 66
46 72
47 48
48 84
49 55
50 87
51 72
52 70
53 54
54 102
55 72
56 88
57 80
58 90
59 60
60 120
61 62
62 96
63 88
64 85
65 84
66 144
67 68
68 90
69 96
70 144

List of values

[1, 3, 4, 5, 6, 12, 8, 11, 11, 18, 12, 20, 14, 24, 24, 21, 18, 33, 20, 30, 32, 36, 24, 44, 29, 42, 34, 40, 30, 72, 32, 43, 48, 54, 48, 55, 38, 60, 56, 66, 42, 96, 44, 60, 66, 72, 48, 84, 55, 87, 72, 70, 54, 102, 72, 88, 80, 90, 60, 120, 62, 96, 88, 85, 84, 144, 68, 90, 96, 144]