A182591 - cp's OEIS frontend

A182591 Number of prime factors of form cn+1 for numbers 3^n-1.

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

[0, 1, 1, 2, 2, 1, 1, 1, 3, 2, 2, 1, 2, 1, 2, 2, 3, 2, 2, 2, 4, 2, 2, 2, 2, 4, 3, 3, 4, 3, 2, 1, 5, 2, 4, 2, 4, 4, 2, 3, 5, 2, 3, 3, 3, 4, 5, 5, 4, 2, 4, 3, 6, 3, 2, 5, 6, 2, 3, 2, 5, 2, 2, 4, 5, 3, 3, 2, 3, 1, 4, 4, 5, 3, 5, 4, 9, 3, 3, 3, 5, 4, 5, 4, 3, 4]

cp's OEIS Frontend

A182591 Number of prime factors of form cn+1 for numbers 3^n-1.

Table of values

List of values

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

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

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