A064131 - cp's OEIS frontend

A064131 Number of divisors of 3^n + 1 that are relatively prime to 3^m + 1 for all 0 < m < n.

n	a(n)
0	2
1	3
2	2
3	2
4	2
5	2
6	2
7	2
8	4
9	4
10	2
11	4
12	2
13	2
14	4
15	4
16	2
17	8
18	2
19	4
20	2
21	4
22	4
23	2
24	8
25	4
26	4
27	4
28	4
29	8
30	2
31	4
32	2
33	4
34	4
35	2
36	2
37	8
38	4
39	16
40	4
41	4
42	4
43	2
44	8
45	4
46	4
47	8
48	4
49	4
50	8
51	8
52	4
53	4
54	2
55	4
56	8
57	8
58	4
59	4
60	8
61	4
62	8
63	16
64	2
65	2
66	2
67	4
68	8
69	32
70	8
71	32
72	4
73	4
74	8
75	16
76	16
77	2
78	4
79	8
80	8
81	32
82	8
83	16
84	32
85	8
86	32
87	32
88	8
89	8
90	4

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

cp's OEIS Frontend

A064131 Number of divisors of 3^n + 1 that are relatively prime to 3^m + 1 for all 0 < m < n.

Table of values

List of values

n	a(n)
0	2
1	3
2	2
3	2
4	2
5	2
6	2
7	2
8	4
9	4
10	2
11	4
12	2
13	2
14	4
15	4
16	2
17	8
18	2
19	4
20	2
21	4
22	4
23	2
24	8
25	4
26	4
27	4
28	4
29	8
30	2
31	4
32	2
33	4
34	4
35	2
36	2
37	8
38	4
39	16
40	4
41	4
42	4
43	2
44	8
45	4
46	4
47	8
48	4
49	4
50	8
51	8
52	4
53	4
54	2
55	4
56	8
57	8
58	4
59	4
60	8
61	4
62	8
63	16
64	2
65	2
66	2
67	4
68	8
69	32
70	8
71	32
72	4
73	4
74	8
75	16
76	16
77	2
78	4
79	8
80	8
81	32
82	8
83	16
84	32
85	8
86	32
87	32
88	8
89	8
90	4

n	a(n)
0	2
1	3
2	2
3	2
4	2
5	2
6	2
7	2
8	4
9	4
10	2
11	4
12	2
13	2
14	4
15	4
16	2
17	8
18	2
19	4
20	2
21	4
22	4
23	2
24	8
25	4
26	4
27	4
28	4
29	8
30	2
31	4
32	2
33	4
34	4
35	2
36	2
37	8
38	4
39	16
40	4
41	4
42	4
43	2
44	8
45	4
46	4
47	8
48	4
49	4
50	8
51	8
52	4
53	4
54	2
55	4
56	8
57	8
58	4
59	4
60	8
61	4
62	8
63	16
64	2
65	2
66	2
67	4
68	8
69	32
70	8
71	32
72	4
73	4
74	8
75	16
76	16
77	2
78	4
79	8
80	8
81	32
82	8
83	16
84	32
85	8
86	32
87	32
88	8
89	8
90	4

n	a(n)
0	2
1	3
2	2
3	2
4	2
5	2
6	2
7	2
8	4
9	4
10	2
11	4
12	2
13	2
14	4
15	4
16	2
17	8
18	2
19	4
20	2
21	4
22	4
23	2
24	8
25	4
26	4
27	4
28	4
29	8
30	2
31	4
32	2
33	4
34	4
35	2
36	2
37	8
38	4
39	16
40	4
41	4
42	4
43	2
44	8
45	4
46	4
47	8
48	4
49	4
50	8
51	8
52	4
53	4
54	2
55	4
56	8
57	8
58	4
59	4
60	8
61	4
62	8
63	16
64	2
65	2
66	2
67	4
68	8
69	32
70	8
71	32
72	4
73	4
74	8
75	16
76	16
77	2
78	4
79	8
80	8
81	32
82	8
83	16
84	32
85	8
86	32
87	32
88	8
89	8
90	4