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.

A292302 Expansion of (1 - x)*Sum_{k>=1} k*phi(k)*x^k/(1 - x^k), where phi() is the Euler totient function (A000010).

Table of values

n a(n)
1 1
2 2
3 4
4 4
5 10
6 0
7 22
8 0
9 18
10 2
11 48
12 -34
13 80
14 -28
15 18
16 24
17 102
18 -90
19 160
20 -112
21 70
22 32
23 174
24 -206
25 220
26 -50
27 76
28 -74
29 340
30 -372
31 490
32 -248
33 94
34 42
35 84
36 -232
37 662
38 -304
39 70
40 -196
41 738
42 -738
43 904
44 -586
45 60
46 240
47 642
48 -966
49 904
50 -538
51 348
52 -184
53 1030
54 -1116
55 690
56 -482
57 552
58 38
59 984
60 -1806

List of values

[1, 2, 4, 4, 10, 0, 22, 0, 18, 2, 48, -34, 80, -28, 18, 24, 102, -90, 160, -112, 70, 32, 174, -206, 220, -50, 76, -74, 340, -372, 490, -248, 94, 42, 84, -232, 662, -304, 70, -196, 738, -738, 904, -586, 60, 240, 642, -966, 904, -538, 348, -184, 1030, -1116, 690, -482, 552, 38, 984, -1806]