A237121 - cp's OEIS frontend

A237121 Number of primes p < prime(n)/2 such that P(p) is a primitive root modulo prime(n), where P(.) is the partition function given by A000041.

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

[0, 0, 1, 1, 2, 2, 2, 3, 3, 5, 1, 3, 4, 1, 4, 5, 5, 5, 3, 4, 6, 6, 5, 7, 6, 8, 5, 8, 5, 8, 10, 9, 9, 9, 11, 7, 6, 9, 11, 9, 14, 5, 6, 4, 10, 4, 6, 7, 12, 9, 14, 9, 8, 11, 11, 17, 23, 11, 15, 6, 13, 22, 14, 14, 11, 19, 11, 7, 22, 13]

cp's OEIS Frontend

A237121 Number of primes p < prime(n)/2 such that P(p) is a primitive root modulo prime(n), where P(.) is the partition function given by A000041.

Table of values

List of values

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

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

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