A057954 - cp's OEIS frontend

A057954 Number of prime factors of 7^n - 1 (counted with multiplicity).

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

[2, 5, 4, 8, 3, 8, 4, 10, 7, 8, 4, 13, 3, 9, 7, 13, 4, 12, 4, 14, 7, 9, 5, 18, 5, 8, 12, 13, 5, 14, 5, 16, 9, 8, 7, 18, 5, 9, 8, 18, 5, 15, 4, 15, 12, 9, 4, 22, 8, 11, 10, 13, 5, 18, 6, 19, 10, 9, 6, 24, 6, 11, 11, 20, 9, 17, 6, 14, 10, 18, 4, 26, 7, 10, 11, 13, 9, 17, 4, 24, 17, 12, 9, 22]

cp's OEIS Frontend

A057954 Number of prime factors of 7^n - 1 (counted with multiplicity).

Table of values

List of values

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

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

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