A242266 - cp's OEIS frontend

A242266 a(n) = |{0 < g < prime(n): g is a primitive root mod prime(n) with g = sum_{j=1..k} prime(j) for some k > 0}|.

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

[0, 1, 1, 1, 1, 1, 2, 2, 3, 2, 1, 3, 2, 2, 3, 3, 2, 3, 3, 1, 3, 2, 3, 3, 5, 2, 2, 6, 2, 4, 1, 3, 2, 3, 5, 2, 2, 2, 6, 6, 6, 7, 2, 6, 4, 4, 4, 5, 6, 5, 6, 3, 1, 3, 7, 9, 9, 2, 5, 2, 2, 6, 4, 5, 6, 6, 4, 3, 8, 3, 6, 6, 7, 5, 6, 9, 8, 6, 4, 4]

cp's OEIS Frontend

A242266 a(n) = |{0 < g < prime(n): g is a primitive root mod prime(n) with g = sum_{j=1..k} prime(j) for some k > 0}|.

Table of values

List of values

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

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

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