A380858 - cp's OEIS frontend

A380858 a(n) is the number of primes p <= n such that p^(p + n) == p (mod p + n).

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

[0, 0, 2, 1, 2, 1, 1, 2, 1, 3, 2, 3, 1, 3, 2, 3, 2, 4, 1, 3, 1, 3, 1, 6, 0, 6, 1, 4, 2, 7, 1, 3, 0, 6, 3, 6, 1, 5, 2, 5, 2, 8, 1, 5, 1, 5, 1, 8, 0, 6, 2, 5, 1, 9, 0, 8, 1, 5, 3, 12, 1, 8, 1, 7, 2, 11, 1, 8, 2, 8, 2, 10, 1, 6, 0, 9, 1, 12, 1, 7, 1, 5, 1, 13, 0, 9, 3, 6, 1, 15]

cp's OEIS Frontend

A380858 a(n) is the number of primes p <= n such that p^(p + n) == p (mod p + n).

Table of values

List of values

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

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

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