A340142 - cp's OEIS frontend

A340142 Dirichlet inverse of A160595, where A160595(x) = phi(x)/gcd(phi(x), x-1).

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

[1, -1, -1, -1, -1, 0, -1, -1, -2, -2, -1, 1, -1, -4, -2, -1, -1, 1, -1, 1, -1, -8, -1, 2, -4, -10, -4, 9, -1, 6, -1, -1, -3, -14, -10, 3, -1, -16, -10, 4, -1, 4, -1, 1, 5, -20, -1, 3, -6, -5, -14, 17, -1, 4, -18, -10, -7, -26, -1, 8, -1, -28, -9, -1, -1, 24, -1, 1, -9, 30, -1, 4, -1, -34, -5, 25, -13, 22, -1, 7, -8, -38, -1, -5]

cp's OEIS Frontend

A340142 Dirichlet inverse of A160595, where A160595(x) = phi(x)/gcd(phi(x), x-1).

Table of values

List of values

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

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

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