A133801 - cp's OEIS frontend

A133801 Number of distinct prime divisors of 3^n - 1.

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	3
7	2
8	3
9	3
10	3
11	3
12	5
13	2
14	3
15	4
16	5
17	3
18	6
19	3
20	5
21	4
22	5
23	3
24	7
25	4
26	3
27	6
28	6
29	4
30	8
31	4
32	6
33	5
34	6
35	5
36	9
37	3
38	5
39	6
40	7
41	4
42	8
43	3
44	8
45	8
46	4
47	5
48	12
49	7
50	7
51	6
52	6
53	4
54	11
55	6
56	9
57	7
58	7
59	3
60	12
61	3
62	6
63	6
64	7
65	6
66	10
67	4
68	9
69	6
70	8
71	2
72	12
73	5
74	6
75	9
76	8
77	7
78	12
79	4
80	11
81	9
82	6
83	5
84	14
85	6
86	4
87	8
88	12
89	4
90	16
91	5
92	7
93	7
94	8
95	6
96	15
97	4
98	10
99	8

[1, 1, 2, 2, 2, 3, 2, 3, 3, 3, 3, 5, 2, 3, 4, 5, 3, 6, 3, 5, 4, 5, 3, 7, 4, 3, 6, 6, 4, 8, 4, 6, 5, 6, 5, 9, 3, 5, 6, 7, 4, 8, 3, 8, 8, 4, 5, 12, 7, 7, 6, 6, 4, 11, 6, 9, 7, 7, 3, 12, 3, 6, 6, 7, 6, 10, 4, 9, 6, 8, 2, 12, 5, 6, 9, 8, 7, 12, 4, 11, 9, 6, 5, 14, 6, 4, 8, 12, 4, 16, 5, 7, 7, 8, 6, 15, 4, 10, 8]

cp's OEIS Frontend

A133801 Number of distinct prime divisors of 3^n - 1.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	3
7	2
8	3
9	3
10	3
11	3
12	5
13	2
14	3
15	4
16	5
17	3
18	6
19	3
20	5
21	4
22	5
23	3
24	7
25	4
26	3
27	6
28	6
29	4
30	8
31	4
32	6
33	5
34	6
35	5
36	9
37	3
38	5
39	6
40	7
41	4
42	8
43	3
44	8
45	8
46	4
47	5
48	12
49	7
50	7
51	6
52	6
53	4
54	11
55	6
56	9
57	7
58	7
59	3
60	12
61	3
62	6
63	6
64	7
65	6
66	10
67	4
68	9
69	6
70	8
71	2
72	12
73	5
74	6
75	9
76	8
77	7
78	12
79	4
80	11
81	9
82	6
83	5
84	14
85	6
86	4
87	8
88	12
89	4
90	16
91	5
92	7
93	7
94	8
95	6
96	15
97	4
98	10
99	8

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	3
7	2
8	3
9	3
10	3
11	3
12	5
13	2
14	3
15	4
16	5
17	3
18	6
19	3
20	5
21	4
22	5
23	3
24	7
25	4
26	3
27	6
28	6
29	4
30	8
31	4
32	6
33	5
34	6
35	5
36	9
37	3
38	5
39	6
40	7
41	4
42	8
43	3
44	8
45	8
46	4
47	5
48	12
49	7
50	7
51	6
52	6
53	4
54	11
55	6
56	9
57	7
58	7
59	3
60	12
61	3
62	6
63	6
64	7
65	6
66	10
67	4
68	9
69	6
70	8
71	2
72	12
73	5
74	6
75	9
76	8
77	7
78	12
79	4
80	11
81	9
82	6
83	5
84	14
85	6
86	4
87	8
88	12
89	4
90	16
91	5
92	7
93	7
94	8
95	6
96	15
97	4
98	10
99	8

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	3
7	2
8	3
9	3
10	3
11	3
12	5
13	2
14	3
15	4
16	5
17	3
18	6
19	3
20	5
21	4
22	5
23	3
24	7
25	4
26	3
27	6
28	6
29	4
30	8
31	4
32	6
33	5
34	6
35	5
36	9
37	3
38	5
39	6
40	7
41	4
42	8
43	3
44	8
45	8
46	4
47	5
48	12
49	7
50	7
51	6
52	6
53	4
54	11
55	6
56	9
57	7
58	7
59	3
60	12
61	3
62	6
63	6
64	7
65	6
66	10
67	4
68	9
69	6
70	8
71	2
72	12
73	5
74	6
75	9
76	8
77	7
78	12
79	4
80	11
81	9
82	6
83	5
84	14
85	6
86	4
87	8
88	12
89	4
90	16
91	5
92	7
93	7
94	8
95	6
96	15
97	4
98	10
99	8