A307757 - cp's OEIS frontend

A307757 Expansion of Product_{k>=1} 1/(1 + x^k/(1 + x^(2*k))).

n	a(n)
0	1
1	-1
2	0
3	0
4	-1
5	0
6	2
7	-2
8	0
9	2
10	-2
11	0
12	4
13	-4
14	0
15	4
16	-5
17	0
18	8
19	-8
20	0
21	8
22	-10
23	0
24	14
25	-15
26	0
27	16
28	-18
29	0
30	24
31	-26
32	0
33	28
34	-32
35	0
36	42
37	-44
38	0
39	48
40	-54
41	0
42	68
43	-72
44	0
45	80
46	-88
47	0
48	108
49	-115
50	0
51	128
52	-140
53	0
54	170
55	-180
56	0
57	200
58	-218
59	0
60	260
61	-276
62	0
63	308
64	-333
65	0
66	392
67	-416
68	0
69	464

[1, -1, 0, 0, -1, 0, 2, -2, 0, 2, -2, 0, 4, -4, 0, 4, -5, 0, 8, -8, 0, 8, -10, 0, 14, -15, 0, 16, -18, 0, 24, -26, 0, 28, -32, 0, 42, -44, 0, 48, -54, 0, 68, -72, 0, 80, -88, 0, 108, -115, 0, 128, -140, 0, 170, -180, 0, 200, -218, 0, 260, -276, 0, 308, -333, 0, 392, -416, 0, 464]

cp's OEIS Frontend

A307757 Expansion of Product_{k>=1} 1/(1 + x^k/(1 + x^(2*k))).

Table of values

List of values