A227899 - cp's OEIS frontend

A227899 Number of primes p < n with 3*p - 4 and n^2 + (n - p)^2 both prime.

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

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

cp's OEIS Frontend

A227899 Number of primes p < n with 3*p - 4 and n^2 + (n - p)^2 both prime.

Table of values

List of values

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

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

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