A327242 - cp's OEIS frontend

A327242 Expansion of Sum_{k>=1} tau(k) * x^k / (1 + x^k)^2, where tau = A000005.

n	a(n)
1	1
2	0
3	5
4	-5
5	7
6	0
7	9
8	-18
9	18
10	0
11	13
12	-25
13	15
14	0
15	35
16	-47
17	19
18	0
19	21
20	-35
21	45
22	0
23	25
24	-90
25	38
26	0
27	58
28	-45
29	31
30	0
31	33
32	-108
33	65
34	0
35	63
36	-90
37	39
38	0
39	75
40	-126
41	43
42	0
43	45
44	-65
45	126
46	0
47	49
48	-235
49	66
50	0
51	95
52	-75
53	55
54	0
55	91
56	-162
57	105
58	0
59	61
60	-175
61	63
62	0
63	162
64	-233
65	105

[1, 0, 5, -5, 7, 0, 9, -18, 18, 0, 13, -25, 15, 0, 35, -47, 19, 0, 21, -35, 45, 0, 25, -90, 38, 0, 58, -45, 31, 0, 33, -108, 65, 0, 63, -90, 39, 0, 75, -126, 43, 0, 45, -65, 126, 0, 49, -235, 66, 0, 95, -75, 55, 0, 91, -162, 105, 0, 61, -175, 63, 0, 162, -233, 105]

cp's OEIS Frontend

A327242 Expansion of Sum_{k>=1} tau(k) * x^k / (1 + x^k)^2, where tau = A000005.

Table of values

List of values