A366660 - cp's OEIS frontend

A366660 Number of distinct prime divisors of 9^n - 1.

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

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

cp's OEIS Frontend

A366660 Number of distinct prime divisors of 9^n - 1.

Table of values

List of values

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

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

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