A237112 - cp's OEIS frontend

A237112 Number of primes p < prime(n)/2 with p! a primitive root modulo prime(n).

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

[0, 0, 1, 0, 2, 2, 1, 1, 1, 2, 2, 2, 2, 2, 4, 4, 6, 4, 2, 3, 3, 4, 7, 9, 5, 7, 5, 8, 4, 7, 6, 7, 8, 7, 11, 8, 9, 7, 13, 10, 16, 4, 7, 8, 13, 9, 8, 12, 17, 10, 14, 12, 4, 10, 14, 15, 18, 8, 9, 8, 8, 18, 6, 8, 7, 16, 9, 11, 21, 15]

cp's OEIS Frontend

A237112 Number of primes p < prime(n)/2 with p! a primitive root modulo prime(n).

Table of values

List of values

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

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

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