A227898 - cp's OEIS frontend

A227898 Number of primes p < n with p + 6 and n + (n - p)^2 both prime.

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

[0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 3, 1, 1, 3, 3, 1, 4, 3, 2, 2, 3, 3, 3, 3, 3, 4, 4, 2, 2, 3, 3, 3, 2, 2, 5, 5, 2, 5, 4, 2, 4, 5, 2, 7, 5, 3, 4, 5, 3, 3, 4, 4, 3, 5, 4, 9, 9, 2, 5, 3, 4, 8, 6, 2, 5, 8, 3, 4, 7, 3, 10, 5, 2, 7, 4, 5, 10, 6, 4, 6, 6, 2, 6, 8, 3, 6, 5, 3, 6, 6, 5, 9, 4, 5, 7, 5, 4, 9, 10]

cp's OEIS Frontend

A227898 Number of primes p < n with p + 6 and n + (n - p)^2 both prime.

Table of values

List of values

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

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

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