A291690 - cp's OEIS frontend

A291690 Least positive integer g which is a primitive root modulo prime(n) and also a primitive root modulo prime(n+1).

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

[5, 2, 3, 17, 2, 6, 3, 10, 10, 3, 13, 13, 12, 5, 5, 2, 2, 2, 7, 11, 28, 6, 6, 7, 7, 11, 5, 6, 6, 3, 6, 6, 3, 2, 12, 6, 18, 20, 5, 2, 2, 21, 19, 5, 3, 3, 3, 5, 6, 6, 21, 7, 14, 6, 5, 7, 15, 6, 11, 3, 3, 5, 22, 17, 14, 3, 29, 15, 2, 13, 13, 19, 6, 2, 10, 10, 18, 6, 21, 26]

cp's OEIS Frontend

A291690 Least positive integer g which is a primitive root modulo prime(n) and also a primitive root modulo prime(n+1).

Table of values

List of values

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

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

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