A331388 - cp's OEIS frontend

A331388 a(n) = Sum_{k=1..n} mu(gcd(n, k)) * k / gcd(n, k).

n	a(n)
1	1
2	0
3	2
4	3
5	9
6	3
7	20
8	12
9	24
10	10
11	54
12	15
13	77
14	21
15	48
16	48
17	135
18	24
19	170
20	57
21	103
22	55
23	252
24	60
25	240
26	78
27	216
28	123
29	405
30	47
31	464
32	192
33	273
34	136
35	390
36	144
37	665
38	171
39	388
40	228
41	819
42	102
43	902
44	327
45	456
46	253
47	1080
48	240
49	1008
50	240
51	678
52	465
53	1377
54	216
55	1036
56	492
57	853
58	406
59	1710

[1, 0, 2, 3, 9, 3, 20, 12, 24, 10, 54, 15, 77, 21, 48, 48, 135, 24, 170, 57, 103, 55, 252, 60, 240, 78, 216, 123, 405, 47, 464, 192, 273, 136, 390, 144, 665, 171, 388, 228, 819, 102, 902, 327, 456, 253, 1080, 240, 1008, 240, 678, 465, 1377, 216, 1036, 492, 853, 406, 1710]

cp's OEIS Frontend

A331388 a(n) = Sum_{k=1..n} mu(gcd(n, k)) * k / gcd(n, k).

Table of values

List of values