A242748 - cp's OEIS frontend

A242748 Number of ordered ways to write n = k + m with 0 < k <= m such that k is a primitive root modulo prime(k) and m is a primitive root modulo prime(m).

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

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

cp's OEIS Frontend

A242748 Number of ordered ways to write n = k + m with 0 < k <= m such that k is a primitive root modulo prime(k) and m is a primitive root modulo prime(m).

Table of values

List of values

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

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

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