A369865 - cp's OEIS frontend

A369865 a(n) = n * Sum_{p|n, p prime} mu(n/p)^2 / p.

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	5
7	1
8	0
9	3
10	7
11	1
12	6
13	1
14	9
15	8
16	0
17	1
18	6
19	1
20	10
21	10
22	13
23	1
24	0
25	5
26	15
27	0
28	14
29	1
30	31
31	1
32	0
33	14
34	19
35	12
36	0
37	1
38	21
39	16
40	0
41	1
42	41
43	1
44	22
45	15
46	25
47	1
48	0
49	7
50	10
51	20
52	26
53	1
54	0
55	16
56	0
57	22
58	31
59	1
60	30
61	1
62	33
63	21
64	0
65	18
66	61
67	1
68	34
69	26
70	59
71	1
72	0
73	1
74	39
75	15
76	38
77	18
78	71
79	1

[0, 1, 1, 2, 1, 5, 1, 0, 3, 7, 1, 6, 1, 9, 8, 0, 1, 6, 1, 10, 10, 13, 1, 0, 5, 15, 0, 14, 1, 31, 1, 0, 14, 19, 12, 0, 1, 21, 16, 0, 1, 41, 1, 22, 15, 25, 1, 0, 7, 10, 20, 26, 1, 0, 16, 0, 22, 31, 1, 30, 1, 33, 21, 0, 18, 61, 1, 34, 26, 59, 1, 0, 1, 39, 15, 38, 18, 71, 1]

cp's OEIS Frontend

A369865 a(n) = n * Sum_{p|n, p prime} mu(n/p)^2 / p.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	5
7	1
8	0
9	3
10	7
11	1
12	6
13	1
14	9
15	8
16	0
17	1
18	6
19	1
20	10
21	10
22	13
23	1
24	0
25	5
26	15
27	0
28	14
29	1
30	31
31	1
32	0
33	14
34	19
35	12
36	0
37	1
38	21
39	16
40	0
41	1
42	41
43	1
44	22
45	15
46	25
47	1
48	0
49	7
50	10
51	20
52	26
53	1
54	0
55	16
56	0
57	22
58	31
59	1
60	30
61	1
62	33
63	21
64	0
65	18
66	61
67	1
68	34
69	26
70	59
71	1
72	0
73	1
74	39
75	15
76	38
77	18
78	71
79	1

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	5
7	1
8	0
9	3
10	7
11	1
12	6
13	1
14	9
15	8
16	0
17	1
18	6
19	1
20	10
21	10
22	13
23	1
24	0
25	5
26	15
27	0
28	14
29	1
30	31
31	1
32	0
33	14
34	19
35	12
36	0
37	1
38	21
39	16
40	0
41	1
42	41
43	1
44	22
45	15
46	25
47	1
48	0
49	7
50	10
51	20
52	26
53	1
54	0
55	16
56	0
57	22
58	31
59	1
60	30
61	1
62	33
63	21
64	0
65	18
66	61
67	1
68	34
69	26
70	59
71	1
72	0
73	1
74	39
75	15
76	38
77	18
78	71
79	1

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	5
7	1
8	0
9	3
10	7
11	1
12	6
13	1
14	9
15	8
16	0
17	1
18	6
19	1
20	10
21	10
22	13
23	1
24	0
25	5
26	15
27	0
28	14
29	1
30	31
31	1
32	0
33	14
34	19
35	12
36	0
37	1
38	21
39	16
40	0
41	1
42	41
43	1
44	22
45	15
46	25
47	1
48	0
49	7
50	10
51	20
52	26
53	1
54	0
55	16
56	0
57	22
58	31
59	1
60	30
61	1
62	33
63	21
64	0
65	18
66	61
67	1
68	34
69	26
70	59
71	1
72	0
73	1
74	39
75	15
76	38
77	18
78	71
79	1