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.

A307704 Expansion of (1/(1 - x)) * Sum_{k>=1} (-x)^k/(1 - (-x)^k).

Table of values

n a(n)
1 -1
2 1
3 -1
4 2
5 0
6 4
7 2
8 6
9 3
10 7
11 5
12 11
13 9
14 13
15 9
16 14
17 12
18 18
19 16
20 22
21 18
22 22
23 20
24 28
25 25
26 29
27 25
28 31
29 29
30 37
31 35
32 41
33 37
34 41
35 37
36 46
37 44
38 48
39 44
40 52
41 50
42 58
43 56
44 62
45 56
46 60
47 58
48 68
49 65
50 71
51 67
52 73
53 71
54 79
55 75
56 83
57 79
58 83
59 81
60 93
61 91
62 95
63 89
64 96
65 92
66 100
67 98
68 104
69 100
70 108

List of values

[-1, 1, -1, 2, 0, 4, 2, 6, 3, 7, 5, 11, 9, 13, 9, 14, 12, 18, 16, 22, 18, 22, 20, 28, 25, 29, 25, 31, 29, 37, 35, 41, 37, 41, 37, 46, 44, 48, 44, 52, 50, 58, 56, 62, 56, 60, 58, 68, 65, 71, 67, 73, 71, 79, 75, 83, 79, 83, 81, 93, 91, 95, 89, 96, 92, 100, 98, 104, 100, 108]