A276172 - cp's OEIS frontend

A276172 Number of primitive prime divisors of 3^n - 2^n.

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

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

cp's OEIS Frontend

A276172 Number of primitive prime divisors of 3^n - 2^n.

Table of values

List of values

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

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

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