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.

A217670 G.f.: Sum_{n>=0} x^n/(1 + x^n)^n.

Table of values

n a(n)
0 1
1 1
2 0
3 2
4 -2
5 2
6 0
7 2
8 -8
9 8
10 0
11 2
12 -12
13 2
14 0
15 32
16 -36
17 2
18 0
19 2
20 -20
21 58
22 0
23 2
24 -136
25 72
26 0
27 92
28 -28
29 2
30 0
31 2
32 -272
33 134
34 0
35 422
36 -288
37 2
38 0
39 184
40 -480
41 2
42 0
43 2
44 -44
45 1232
46 0
47 2
48 -2360
49 926
50 0
51 308
52 -52
53 2
54 0
55 2004
56 -1176
57 382
58 0
59 2
60 -4064
61 2
62 0
63 6470
64 -5128
65 3642

List of values

[1, 1, 0, 2, -2, 2, 0, 2, -8, 8, 0, 2, -12, 2, 0, 32, -36, 2, 0, 2, -20, 58, 0, 2, -136, 72, 0, 92, -28, 2, 0, 2, -272, 134, 0, 422, -288, 2, 0, 184, -480, 2, 0, 2, -44, 1232, 0, 2, -2360, 926, 0, 308, -52, 2, 0, 2004, -1176, 382, 0, 2, -4064, 2, 0, 6470, -5128, 3642]