A381532 - cp's OEIS frontend

A381532 Smallest integer k>0 such that prime(n) + k*prime(n+1) is prime.

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

[1, 2, 2, 2, 2, 2, 6, 6, 4, 8, 4, 6, 2, 2, 10, 10, 2, 6, 12, 6, 4, 6, 4, 2, 14, 2, 2, 6, 6, 2, 2, 6, 6, 6, 20, 6, 4, 8, 4, 16, 2, 2, 2, 2, 8, 10, 4, 2, 6, 6, 6, 14, 2, 4, 10, 6, 2, 6, 2, 6, 18, 2, 2, 2, 2, 12, 10, 2, 6, 6, 4, 2, 22, 4, 6, 10, 12, 6, 8, 8, 12, 2]

cp's OEIS Frontend

A381532 Smallest integer k>0 such that prime(n) + k*prime(n+1) is prime.

Table of values

List of values

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

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

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