A236531 - cp's OEIS frontend

A236531 a(n) = |{0 < k < n: {6k -1 , 6k + 1} and {prime(n-k), prime(n-k) + 2} are both twin prime pairs}|.

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

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

cp's OEIS Frontend

A236531 a(n) = |{0 < k < n: {6k -1 , 6k + 1} and {prime(n-k), prime(n-k) + 2} are both twin prime pairs}|.

Table of values

List of values

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

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

cp's OEIS Frontend

A236531 a(n) = |{0 < k < n: {6*k -1 , 6*k + 1} and {prime(n-k), prime(n-k) + 2} are both twin prime pairs}|.

Table of values

List of values

A236531 a(n) = |{0 < k < n: {6k -1 , 6k + 1} and {prime(n-k), prime(n-k) + 2} are both twin prime pairs}|.

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