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.

A373003 a(n) = (1/n) * Sum_{k=1..n} tau( (n/gcd(k,n))^n ).

Table of values

n a(n)
1 1
2 2
3 3
4 6
5 5
6 20
7 7
8 18
9 15
10 54
11 11
12 144
13 13
14 104
15 143
16 50
17 17
18 290
19 19
20 442
21 285
22 252
23 23
24 884
25 45
26 350
27 69
28 900
29 29
30 8400
31 31
32 130
33 713
34 594
35 899
36 2622
37 37
38 740
39 999
40 2838
41 41
42 23606
43 43
44 2296
45 2627
46 1080
47 47
48 4884
49 91
50 2314
51 1715
52 3234
53 53
54 3836
55 2295
56 5880
57 2145

List of values

[1, 2, 3, 6, 5, 20, 7, 18, 15, 54, 11, 144, 13, 104, 143, 50, 17, 290, 19, 442, 285, 252, 23, 884, 45, 350, 69, 900, 29, 8400, 31, 130, 713, 594, 899, 2622, 37, 740, 999, 2838, 41, 23606, 43, 2296, 2627, 1080, 47, 4884, 91, 2314, 1715, 3234, 53, 3836, 2295, 5880, 2145]