A243158 - cp's OEIS frontend

A243158 Smallest k>=0 such that prime(n)*prime(n+k) + 2 is prime.

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

[0, 1, 1, 3, 1, 5, 1, 3, 4, 4, 3, 5, 2, 6, 13, 5, 6, 1, 9, 28, 8, 2, 10, 8, 5, 8, 3, 3, 31, 2, 2, 9, 6, 1, 3, 6, 2, 5, 4, 1, 10, 3, 7, 3, 6, 7, 4, 4, 1, 14, 1, 1, 4, 4, 18, 1, 8, 1, 3, 10, 3, 1, 6, 1, 7, 2, 26, 19, 6, 2, 8, 30, 23, 6, 19, 5, 1, 1, 12, 1, 7]

cp's OEIS Frontend

A243158 Smallest k>=0 such that prime(n)*prime(n+k) + 2 is prime.

Table of values

List of values

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

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

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