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.

A068970 a(n) = Sum_{d|n} phi(d^4).

Table of values

n a(n)
1 1
2 9
3 55
4 137
5 501
6 495
7 2059
8 2185
9 4429
10 4509
11 13311
12 7535
13 26365
14 18531
15 27555
16 34953
17 78609
18 39861
19 123463
20 68637
21 113245
22 119799
23 267675
24 120175
25 313001
26 237285
27 358723
28 282083
29 682893
30 247995
31 893731
32 559241
33 732105
34 707481
35 1031559
36 606773
37 1823509

List of values

[1, 9, 55, 137, 501, 495, 2059, 2185, 4429, 4509, 13311, 7535, 26365, 18531, 27555, 34953, 78609, 39861, 123463, 68637, 113245, 119799, 267675, 120175, 313001, 237285, 358723, 282083, 682893, 247995, 893731, 559241, 732105, 707481, 1031559, 606773, 1823509]