A064124 - cp's OEIS frontend

A064124 Number of divisors of 7^n - 1 that are relatively prime to 7^m - 1 for all 0 < m < n.

n	a(n)
1	4
2	1
3	2
4	3
5	2
6	2
7	4
8	2
9	4
10	4
11	4
12	4
13	2
14	4
15	4
16	4
17	4
18	2
19	4
20	4
21	2
22	4
23	8
24	8
25	4
26	4
27	16
28	2
29	8
30	2
31	8
32	4
33	8
34	2
35	4
36	2
37	8
38	4
39	8
40	4
41	8
42	4
43	4
44	8
45	4
46	2
47	4
48	2
49	16
50	2
51	16
52	4
53	8
54	2
55	2
56	16
57	8
58	2
59	16
60	4
61	16
62	8
63	2
64	8
65	32
66	4
67	16
68	8
69	8
70	16
71	4
72	8
73	32
74	4
75	4
76	2
77	8
78	8
79	4
80	8
81	16
82	16
83	128
84	2
85	8

[4, 1, 2, 3, 2, 2, 4, 2, 4, 4, 4, 4, 2, 4, 4, 4, 4, 2, 4, 4, 2, 4, 8, 8, 4, 4, 16, 2, 8, 2, 8, 4, 8, 2, 4, 2, 8, 4, 8, 4, 8, 4, 4, 8, 4, 2, 4, 2, 16, 2, 16, 4, 8, 2, 2, 16, 8, 2, 16, 4, 16, 8, 2, 8, 32, 4, 16, 8, 8, 16, 4, 8, 32, 4, 4, 2, 8, 8, 4, 8, 16, 16, 128, 2, 8]

cp's OEIS Frontend

A064124 Number of divisors of 7^n - 1 that are relatively prime to 7^m - 1 for all 0 < m < n.

Table of values

List of values

n	a(n)
1	4
2	1
3	2
4	3
5	2
6	2
7	4
8	2
9	4
10	4
11	4
12	4
13	2
14	4
15	4
16	4
17	4
18	2
19	4
20	4
21	2
22	4
23	8
24	8
25	4
26	4
27	16
28	2
29	8
30	2
31	8
32	4
33	8
34	2
35	4
36	2
37	8
38	4
39	8
40	4
41	8
42	4
43	4
44	8
45	4
46	2
47	4
48	2
49	16
50	2
51	16
52	4
53	8
54	2
55	2
56	16
57	8
58	2
59	16
60	4
61	16
62	8
63	2
64	8
65	32
66	4
67	16
68	8
69	8
70	16
71	4
72	8
73	32
74	4
75	4
76	2
77	8
78	8
79	4
80	8
81	16
82	16
83	128
84	2
85	8

n	a(n)
1	4
2	1
3	2
4	3
5	2
6	2
7	4
8	2
9	4
10	4
11	4
12	4
13	2
14	4
15	4
16	4
17	4
18	2
19	4
20	4
21	2
22	4
23	8
24	8
25	4
26	4
27	16
28	2
29	8
30	2
31	8
32	4
33	8
34	2
35	4
36	2
37	8
38	4
39	8
40	4
41	8
42	4
43	4
44	8
45	4
46	2
47	4
48	2
49	16
50	2
51	16
52	4
53	8
54	2
55	2
56	16
57	8
58	2
59	16
60	4
61	16
62	8
63	2
64	8
65	32
66	4
67	16
68	8
69	8
70	16
71	4
72	8
73	32
74	4
75	4
76	2
77	8
78	8
79	4
80	8
81	16
82	16
83	128
84	2
85	8

n	a(n)
1	4
2	1
3	2
4	3
5	2
6	2
7	4
8	2
9	4
10	4
11	4
12	4
13	2
14	4
15	4
16	4
17	4
18	2
19	4
20	4
21	2
22	4
23	8
24	8
25	4
26	4
27	16
28	2
29	8
30	2
31	8
32	4
33	8
34	2
35	4
36	2
37	8
38	4
39	8
40	4
41	8
42	4
43	4
44	8
45	4
46	2
47	4
48	2
49	16
50	2
51	16
52	4
53	8
54	2
55	2
56	16
57	8
58	2
59	16
60	4
61	16
62	8
63	2
64	8
65	32
66	4
67	16
68	8
69	8
70	16
71	4
72	8
73	32
74	4
75	4
76	2
77	8
78	8
79	4
80	8
81	16
82	16
83	128
84	2
85	8