A138319 - cp's OEIS frontend

A138319 Number of ways in which 2n can be represented as p+g, where p is a prime and g is a prime primitive root of p.

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	1
7	0
8	0
9	1
10	2
11	2
12	2
13	0
14	2
15	1
16	2
17	2
18	0
19	0
20	2
21	3
22	1
23	1
24	4
25	1
26	2
27	2
28	2
29	3
30	2
31	1
32	0
33	1
34	1
35	3
36	3
37	1
38	1
39	5
40	1
41	3
42	3
43	2
44	2
45	2
46	2
47	1
48	3
49	1
50	0
51	6
52	4
53	1
54	5
55	1
56	3
57	3
58	2
59	3
60	5
61	2
62	2
63	4
64	1
65	6
66	5
67	2
68	2
69	4
70	1
71	3
72	0
73	2
74	2
75	6
76	1
77	3
78	7
79	2
80	5
81	6
82	1
83	3
84	5
85	3
86	4
87	4
88	2
89	2
90	7
91	1
92	4
93	1
94	1
95	6
96	5
97	1
98	0
99	2
100	3
101	4
102	5
103	0
104	4
105	7

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

cp's OEIS Frontend

A138319 Number of ways in which 2n can be represented as p+g, where p is a prime and g is a prime primitive root of p.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	1
7	0
8	0
9	1
10	2
11	2
12	2
13	0
14	2
15	1
16	2
17	2
18	0
19	0
20	2
21	3
22	1
23	1
24	4
25	1
26	2
27	2
28	2
29	3
30	2
31	1
32	0
33	1
34	1
35	3
36	3
37	1
38	1
39	5
40	1
41	3
42	3
43	2
44	2
45	2
46	2
47	1
48	3
49	1
50	0
51	6
52	4
53	1
54	5
55	1
56	3
57	3
58	2
59	3
60	5
61	2
62	2
63	4
64	1
65	6
66	5
67	2
68	2
69	4
70	1
71	3
72	0
73	2
74	2
75	6
76	1
77	3
78	7
79	2
80	5
81	6
82	1
83	3
84	5
85	3
86	4
87	4
88	2
89	2
90	7
91	1
92	4
93	1
94	1
95	6
96	5
97	1
98	0
99	2
100	3
101	4
102	5
103	0
104	4
105	7

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	1
7	0
8	0
9	1
10	2
11	2
12	2
13	0
14	2
15	1
16	2
17	2
18	0
19	0
20	2
21	3
22	1
23	1
24	4
25	1
26	2
27	2
28	2
29	3
30	2
31	1
32	0
33	1
34	1
35	3
36	3
37	1
38	1
39	5
40	1
41	3
42	3
43	2
44	2
45	2
46	2
47	1
48	3
49	1
50	0
51	6
52	4
53	1
54	5
55	1
56	3
57	3
58	2
59	3
60	5
61	2
62	2
63	4
64	1
65	6
66	5
67	2
68	2
69	4
70	1
71	3
72	0
73	2
74	2
75	6
76	1
77	3
78	7
79	2
80	5
81	6
82	1
83	3
84	5
85	3
86	4
87	4
88	2
89	2
90	7
91	1
92	4
93	1
94	1
95	6
96	5
97	1
98	0
99	2
100	3
101	4
102	5
103	0
104	4
105	7

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	1
7	0
8	0
9	1
10	2
11	2
12	2
13	0
14	2
15	1
16	2
17	2
18	0
19	0
20	2
21	3
22	1
23	1
24	4
25	1
26	2
27	2
28	2
29	3
30	2
31	1
32	0
33	1
34	1
35	3
36	3
37	1
38	1
39	5
40	1
41	3
42	3
43	2
44	2
45	2
46	2
47	1
48	3
49	1
50	0
51	6
52	4
53	1
54	5
55	1
56	3
57	3
58	2
59	3
60	5
61	2
62	2
63	4
64	1
65	6
66	5
67	2
68	2
69	4
70	1
71	3
72	0
73	2
74	2
75	6
76	1
77	3
78	7
79	2
80	5
81	6
82	1
83	3
84	5
85	3
86	4
87	4
88	2
89	2
90	7
91	1
92	4
93	1
94	1
95	6
96	5
97	1
98	0
99	2
100	3
101	4
102	5
103	0
104	4
105	7