A097945 - cp's OEIS frontend

A097945 a(n) = mu(n)*phi(n) where mu(n) is the Mobius function (A008683) and phi(n) is the Euler totient function (A000010).

n	a(n)
1	1
2	-1
3	-2
4	0
5	-4
6	2
7	-6
8	0
9	0
10	4
11	-10
12	0
13	-12
14	6
15	8
16	0
17	-16
18	0
19	-18
20	0
21	12
22	10
23	-22
24	0
25	0
26	12
27	0
28	0
29	-28
30	-8
31	-30
32	0
33	20
34	16
35	24
36	0
37	-36
38	18
39	24
40	0
41	-40
42	-12
43	-42
44	0
45	0
46	22
47	-46
48	0
49	0
50	0
51	32
52	0
53	-52
54	0
55	40
56	0
57	36
58	28
59	-58
60	0
61	-60
62	30
63	0
64	0
65	48
66	-20
67	-66
68	0
69	44
70	-24
71	-70
72	0
73	-72
74	36
75	0
76	0
77	60
78	-24
79	-78
80	0
81	0
82	40
83	-82
84	0

[1, -1, -2, 0, -4, 2, -6, 0, 0, 4, -10, 0, -12, 6, 8, 0, -16, 0, -18, 0, 12, 10, -22, 0, 0, 12, 0, 0, -28, -8, -30, 0, 20, 16, 24, 0, -36, 18, 24, 0, -40, -12, -42, 0, 0, 22, -46, 0, 0, 0, 32, 0, -52, 0, 40, 0, 36, 28, -58, 0, -60, 30, 0, 0, 48, -20, -66, 0, 44, -24, -70, 0, -72, 36, 0, 0, 60, -24, -78, 0, 0, 40, -82, 0]

cp's OEIS Frontend

A097945 a(n) = mu(n)*phi(n) where mu(n) is the Mobius function (A008683) and phi(n) is the Euler totient function (A000010).

Table of values

List of values

n	a(n)
1	1
2	-1
3	-2
4	0
5	-4
6	2
7	-6
8	0
9	0
10	4
11	-10
12	0
13	-12
14	6
15	8
16	0
17	-16
18	0
19	-18
20	0
21	12
22	10
23	-22
24	0
25	0
26	12
27	0
28	0
29	-28
30	-8
31	-30
32	0
33	20
34	16
35	24
36	0
37	-36
38	18
39	24
40	0
41	-40
42	-12
43	-42
44	0
45	0
46	22
47	-46
48	0
49	0
50	0
51	32
52	0
53	-52
54	0
55	40
56	0
57	36
58	28
59	-58
60	0
61	-60
62	30
63	0
64	0
65	48
66	-20
67	-66
68	0
69	44
70	-24
71	-70
72	0
73	-72
74	36
75	0
76	0
77	60
78	-24
79	-78
80	0
81	0
82	40
83	-82
84	0

n	a(n)
1	1
2	-1
3	-2
4	0
5	-4
6	2
7	-6
8	0
9	0
10	4
11	-10
12	0
13	-12
14	6
15	8
16	0
17	-16
18	0
19	-18
20	0
21	12
22	10
23	-22
24	0
25	0
26	12
27	0
28	0
29	-28
30	-8
31	-30
32	0
33	20
34	16
35	24
36	0
37	-36
38	18
39	24
40	0
41	-40
42	-12
43	-42
44	0
45	0
46	22
47	-46
48	0
49	0
50	0
51	32
52	0
53	-52
54	0
55	40
56	0
57	36
58	28
59	-58
60	0
61	-60
62	30
63	0
64	0
65	48
66	-20
67	-66
68	0
69	44
70	-24
71	-70
72	0
73	-72
74	36
75	0
76	0
77	60
78	-24
79	-78
80	0
81	0
82	40
83	-82
84	0

n	a(n)
1	1
2	-1
3	-2
4	0
5	-4
6	2
7	-6
8	0
9	0
10	4
11	-10
12	0
13	-12
14	6
15	8
16	0
17	-16
18	0
19	-18
20	0
21	12
22	10
23	-22
24	0
25	0
26	12
27	0
28	0
29	-28
30	-8
31	-30
32	0
33	20
34	16
35	24
36	0
37	-36
38	18
39	24
40	0
41	-40
42	-12
43	-42
44	0
45	0
46	22
47	-46
48	0
49	0
50	0
51	32
52	0
53	-52
54	0
55	40
56	0
57	36
58	28
59	-58
60	0
61	-60
62	30
63	0
64	0
65	48
66	-20
67	-66
68	0
69	44
70	-24
71	-70
72	0
73	-72
74	36
75	0
76	0
77	60
78	-24
79	-78
80	0
81	0
82	40
83	-82
84	0