A238756 - cp's OEIS frontend

A238756 Number of ordered ways to write n = k + m (k > 0 and m > 0) such that 2*k + 1, prime(prime(k)) - prime(k) + 1 and prime(prime(m)) - prime(m) + 1 are all prime.

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

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

cp's OEIS Frontend

A238756 Number of ordered ways to write n = k + m (k > 0 and m > 0) such that 2*k + 1, prime(prime(k)) - prime(k) + 1 and prime(prime(m)) - prime(m) + 1 are all prime.

Table of values

List of values

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

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

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