A237594 - cp's OEIS frontend

A237594 Number of primes p < prime(n)/2 such that the Bell number B(p) is a primitive root modulo prime(n).

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

[0, 0, 1, 1, 2, 1, 2, 3, 1, 1, 2, 4, 2, 4, 6, 5, 7, 3, 4, 3, 4, 2, 12, 7, 3, 5, 4, 9, 5, 6, 4, 5, 12, 6, 7, 5, 9, 6, 12, 11, 13, 7, 7, 7, 14, 5, 5, 14, 14, 8, 13, 11, 7, 10, 19, 17, 16, 8, 11, 7, 7, 23, 11, 12, 10, 22, 14, 8, 22, 11, 20, 22, 13, 13, 15, 24, 27, 14, 18, 18]

cp's OEIS Frontend

A237594 Number of primes p < prime(n)/2 such that the Bell number B(p) is a primitive root modulo prime(n).

Table of values

List of values

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

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

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