A057958 - cp's OEIS frontend

A057958 Number of prime factors of 3^n - 1 (counted with multiplicity).

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

[1, 3, 2, 5, 3, 5, 2, 7, 3, 6, 3, 8, 2, 5, 5, 10, 3, 8, 3, 10, 4, 7, 3, 11, 5, 5, 6, 9, 4, 11, 4, 12, 5, 8, 6, 12, 3, 7, 7, 13, 4, 11, 3, 11, 9, 6, 5, 17, 7, 10, 6, 9, 4, 13, 8, 13, 7, 9, 3, 17, 3, 8, 6, 14, 7, 12, 4, 12, 6, 11, 2, 16, 5, 8, 10, 11, 7, 15, 4, 18, 9, 8, 5, 18, 7, 6, 8, 16, 4, 19, 5]

cp's OEIS Frontend

A057958 Number of prime factors of 3^n - 1 (counted with multiplicity).

Table of values

List of values

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

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

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