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.

A362029 a(n) = Sum_{k=1..n} (-1)^(n-k) * k * mu(k)^2, where mu(k) is the Moebius function.

Table of values

n a(n)
1 1
2 1
3 2
4 -2
5 7
6 -1
7 8
8 -8
9 8
10 2
11 9
12 -9
13 22
14 -8
15 23
16 -23
17 40
18 -40
19 59
20 -59
21 80
22 -58
23 81
24 -81
25 81
26 -55
27 55
28 -55
29 84
30 -54
31 85
32 -85
33 118
34 -84
35 119
36 -119
37 156
38 -118
39 157
40 -157
41 198
42 -156
43 199
44 -199
45 199
46 -153
47 200
48 -200
49 200
50 -200
51 251
52 -251
53 304
54 -304
55 359
56 -359
57 416
58 -358
59 417
60 -417
61 478
62 -416
63 416

List of values

[1, 1, 2, -2, 7, -1, 8, -8, 8, 2, 9, -9, 22, -8, 23, -23, 40, -40, 59, -59, 80, -58, 81, -81, 81, -55, 55, -55, 84, -54, 85, -85, 118, -84, 119, -119, 156, -118, 157, -157, 198, -156, 199, -199, 199, -153, 200, -200, 200, -200, 251, -251, 304, -304, 359, -359, 416, -358, 417, -417, 478, -416, 416]