A237260 - cp's OEIS frontend

A237260 Least positive integer m < n with prime(prime(m)) + 2 and prime(n-m) + 2 both prime, or 0 if such a number m does not exist.

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	1
7	2
8	1
9	2
10	3
11	1
12	2
13	3
14	1
15	2
16	3
17	4
18	1
19	2
20	3
21	1
22	2
23	3
24	4
25	23
26	6
27	1
28	2
29	1
30	2
31	3
32	4
33	7
34	1
35	2
36	1
37	2
38	3
39	4
40	7
41	6
42	1
43	2
44	1
45	2
46	1
47	2
48	3
49	4
50	1
51	2
52	3
53	1
54	2
55	3
56	4
57	14
58	1
59	2
60	3
61	1
62	2
63	3
64	4
65	1
66	2
67	3
68	4
69	24
70	1

[0, 0, 1, 1, 2, 1, 2, 1, 2, 3, 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 1, 2, 3, 4, 23, 6, 1, 2, 1, 2, 3, 4, 7, 1, 2, 1, 2, 3, 4, 7, 6, 1, 2, 1, 2, 1, 2, 3, 4, 1, 2, 3, 1, 2, 3, 4, 14, 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 4, 24, 1]

cp's OEIS Frontend

A237260 Least positive integer m < n with prime(prime(m)) + 2 and prime(n-m) + 2 both prime, or 0 if such a number m does not exist.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	1
7	2
8	1
9	2
10	3
11	1
12	2
13	3
14	1
15	2
16	3
17	4
18	1
19	2
20	3
21	1
22	2
23	3
24	4
25	23
26	6
27	1
28	2
29	1
30	2
31	3
32	4
33	7
34	1
35	2
36	1
37	2
38	3
39	4
40	7
41	6
42	1
43	2
44	1
45	2
46	1
47	2
48	3
49	4
50	1
51	2
52	3
53	1
54	2
55	3
56	4
57	14
58	1
59	2
60	3
61	1
62	2
63	3
64	4
65	1
66	2
67	3
68	4
69	24
70	1

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	1
7	2
8	1
9	2
10	3
11	1
12	2
13	3
14	1
15	2
16	3
17	4
18	1
19	2
20	3
21	1
22	2
23	3
24	4
25	23
26	6
27	1
28	2
29	1
30	2
31	3
32	4
33	7
34	1
35	2
36	1
37	2
38	3
39	4
40	7
41	6
42	1
43	2
44	1
45	2
46	1
47	2
48	3
49	4
50	1
51	2
52	3
53	1
54	2
55	3
56	4
57	14
58	1
59	2
60	3
61	1
62	2
63	3
64	4
65	1
66	2
67	3
68	4
69	24
70	1

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	1
7	2
8	1
9	2
10	3
11	1
12	2
13	3
14	1
15	2
16	3
17	4
18	1
19	2
20	3
21	1
22	2
23	3
24	4
25	23
26	6
27	1
28	2
29	1
30	2
31	3
32	4
33	7
34	1
35	2
36	1
37	2
38	3
39	4
40	7
41	6
42	1
43	2
44	1
45	2
46	1
47	2
48	3
49	4
50	1
51	2
52	3
53	1
54	2
55	3
56	4
57	14
58	1
59	2
60	3
61	1
62	2
63	3
64	4
65	1
66	2
67	3
68	4
69	24
70	1