A366580 - cp's OEIS frontend

A366580 Number of distinct prime divisors of 3^n + 1.

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

[1, 1, 2, 2, 2, 2, 3, 2, 3, 4, 3, 3, 3, 2, 4, 5, 2, 4, 4, 3, 3, 5, 4, 2, 6, 4, 4, 6, 4, 4, 5, 3, 2, 6, 4, 4, 4, 4, 4, 7, 5, 3, 7, 2, 5, 9, 4, 4, 4, 4, 6, 8, 4, 3, 5, 6, 6, 7, 4, 3, 7, 3, 5, 11, 2, 4, 6, 3, 5, 8, 8, 6, 8, 3, 5, 11, 6, 5, 7, 4, 5, 11, 5, 5, 10, 8]

cp's OEIS Frontend

A366580 Number of distinct prime divisors of 3^n + 1.

Table of values

List of values

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

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

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