A235189 - cp's OEIS frontend

A235189 Number of ways to write n = (1 + (n mod 2))*p + q with p < n/2 such that p, q and prime(p) - p + 1 are all prime.

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

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

cp's OEIS Frontend

A235189 Number of ways to write n = (1 + (n mod 2))*p + q with p < n/2 such that p, q and prime(p) - p + 1 are all prime.

Table of values

List of values

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

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

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