A358276 - cp's OEIS frontend

A358276 a(1) = 1; a(n) = n * Sum_{d|n, d < n} (-1)^(n/d - 1) * a(d) / d.

n	a(n)
1	1
2	-2
3	3
4	0
5	5
6	-18
7	7
8	0
9	18
10	-30
11	11
12	24
13	13
14	-42
15	45
16	0
17	17
18	-144
19	19
20	40
21	63
22	-66
23	23
24	0
25	50
26	-78
27	108
28	56
29	29
30	-390
31	31
32	0
33	99
34	-102
35	105
36	360
37	37
38	-114
39	117
40	0
41	41
42	-546
43	43
44	88
45	360
46	-138
47	47
48	0
49	98
50	-400
51	153
52	104
53	53
54	-1080
55	165
56	0
57	171
58	-174
59	59
60	1080
61	61
62	-186
63	504
64	0
65	195
66	-858
67	67
68	136

[1, -2, 3, 0, 5, -18, 7, 0, 18, -30, 11, 24, 13, -42, 45, 0, 17, -144, 19, 40, 63, -66, 23, 0, 50, -78, 108, 56, 29, -390, 31, 0, 99, -102, 105, 360, 37, -114, 117, 0, 41, -546, 43, 88, 360, -138, 47, 0, 98, -400, 153, 104, 53, -1080, 165, 0, 171, -174, 59, 1080, 61, -186, 504, 0, 195, -858, 67, 136]

cp's OEIS Frontend

A358276 a(1) = 1; a(n) = n * Sum_{d|n, d < n} (-1)^(n/d - 1) * a(d) / d.

Table of values

List of values