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.

A069947 Denominator of Sum_{k=1..n} k/phi(k).

Table of values

n a(n)
1 1
2 1
3 2
4 2
5 4
6 4
7 12
8 12
9 12
10 12
11 60
12 60
13 10
14 30
15 120
16 120
17 240
18 240
19 720
20 720
21 720
22 720
23 7920
24 7920
25 7920
26 7920
27 7920
28 7920
29 55440
30 55440
31 11088
32 11088
33 55440
34 55440
35 55440
36 55440
37 18480
38 55440
39 55440
40 55440
41 55440
42 55440
43 55440
44 11088
45 11088
46 11088
47 255024
48 255024

List of values

[1, 1, 2, 2, 4, 4, 12, 12, 12, 12, 60, 60, 10, 30, 120, 120, 240, 240, 720, 720, 720, 720, 7920, 7920, 7920, 7920, 7920, 7920, 55440, 55440, 11088, 11088, 55440, 55440, 55440, 55440, 18480, 55440, 55440, 55440, 55440, 55440, 55440, 11088, 11088, 11088, 255024, 255024]