A361985 - cp's OEIS frontend

A361985 a(1) = 1, a(2) = 1; a(n) = n * Sum_{d|n, d < n} (-1)^(n/d) a(d) / d.

n	a(n)
1	1
2	1
3	-3
4	6
5	-5
6	-3
7	-7
8	24
9	0
10	-5
11	-11
12	-18
13	-13
14	-7
15	15
16	96
17	-17
18	0
19	-19
20	-30
21	21
22	-11
23	-23
24	-72
25	0
26	-13
27	0
28	-42
29	-29
30	15
31	-31
32	384
33	33
34	-17
35	35
36	0
37	-37
38	-19
39	39
40	-120
41	-41
42	21
43	-43
44	-66
45	0
46	-23
47	-47
48	-288
49	0
50	0
51	51
52	-78
53	-53
54	0
55	55
56	-168
57	57
58	-29
59	-59
60	90
61	-61
62	-31
63	0
64	1536
65	65
66	33
67	-67
68	-102
69	69
70	35
71	-71
72	0
73	-73
74	-37
75	0

[1, 1, -3, 6, -5, -3, -7, 24, 0, -5, -11, -18, -13, -7, 15, 96, -17, 0, -19, -30, 21, -11, -23, -72, 0, -13, 0, -42, -29, 15, -31, 384, 33, -17, 35, 0, -37, -19, 39, -120, -41, 21, -43, -66, 0, -23, -47, -288, 0, 0, 51, -78, -53, 0, 55, -168, 57, -29, -59, 90, -61, -31, 0, 1536, 65, 33, -67, -102, 69, 35, -71, 0, -73, -37, 0]

cp's OEIS Frontend

A361985 a(1) = 1, a(2) = 1; a(n) = n * Sum_{d|n, d < n} (-1)^(n/d) a(d) / d.

Table of values

List of values