A366651 - cp's OEIS frontend

A366651 Number of distinct prime divisors of 8^n - 1.

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

[1, 2, 2, 4, 3, 4, 3, 6, 3, 6, 4, 8, 4, 6, 6, 9, 5, 6, 4, 11, 6, 8, 4, 12, 7, 7, 6, 12, 6, 11, 3, 12, 8, 10, 10, 12, 6, 8, 9, 15, 5, 11, 5, 14, 10, 8, 6, 17, 5, 13, 8, 16, 8, 12, 10, 17, 7, 10, 6, 21, 5, 7, 9, 15, 8, 15, 6, 19, 9, 20, 7, 18, 7, 12, 14, 16, 9]

cp's OEIS Frontend

A366651 Number of distinct prime divisors of 8^n - 1.

Table of values

List of values

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

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

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