A071558 - cp's OEIS frontend

A071558 Smallest k such that nk + 1 and nk - 1 are twin primes.

n	a(n)
1	4
2	2
3	2
4	1
5	6
6	1
7	6
8	9
9	2
10	3
11	18
12	1
13	24
14	3
15	2
16	12
17	6
18	1
19	12
20	3
21	2
22	9
23	6
24	3
25	6
26	12
27	4
28	15
29	12
30	1
31	42
32	6
33	6
34	3
35	12
36	2
37	54
38	6
39	8
40	6
41	30
42	1
43	24
44	15
45	4
46	3
47	6
48	4
49	18
50	3
51	2
52	6
53	120
54	2
55	12
56	48
57	4
58	6
59	18
60	1
61	258
62	21
63	14
64	3
65	30
66	3
67	24
68	15
69	2
70	6
71	18
72	1
73	84
74	27
75	2
76	3
77	6
78	4
79	132
80	3
81	10
82	15
83	54
84	5
85	12
86	12

[4, 2, 2, 1, 6, 1, 6, 9, 2, 3, 18, 1, 24, 3, 2, 12, 6, 1, 12, 3, 2, 9, 6, 3, 6, 12, 4, 15, 12, 1, 42, 6, 6, 3, 12, 2, 54, 6, 8, 6, 30, 1, 24, 15, 4, 3, 6, 4, 18, 3, 2, 6, 120, 2, 12, 48, 4, 6, 18, 1, 258, 21, 14, 3, 30, 3, 24, 15, 2, 6, 18, 1, 84, 27, 2, 3, 6, 4, 132, 3, 10, 15, 54, 5, 12, 12]

cp's OEIS Frontend

A071558 Smallest k such that nk + 1 and nk - 1 are twin primes.

Table of values

List of values

n	a(n)
1	4
2	2
3	2
4	1
5	6
6	1
7	6
8	9
9	2
10	3
11	18
12	1
13	24
14	3
15	2
16	12
17	6
18	1
19	12
20	3
21	2
22	9
23	6
24	3
25	6
26	12
27	4
28	15
29	12
30	1
31	42
32	6
33	6
34	3
35	12
36	2
37	54
38	6
39	8
40	6
41	30
42	1
43	24
44	15
45	4
46	3
47	6
48	4
49	18
50	3
51	2
52	6
53	120
54	2
55	12
56	48
57	4
58	6
59	18
60	1
61	258
62	21
63	14
64	3
65	30
66	3
67	24
68	15
69	2
70	6
71	18
72	1
73	84
74	27
75	2
76	3
77	6
78	4
79	132
80	3
81	10
82	15
83	54
84	5
85	12
86	12

n	a(n)
1	4
2	2
3	2
4	1
5	6
6	1
7	6
8	9
9	2
10	3
11	18
12	1
13	24
14	3
15	2
16	12
17	6
18	1
19	12
20	3
21	2
22	9
23	6
24	3
25	6
26	12
27	4
28	15
29	12
30	1
31	42
32	6
33	6
34	3
35	12
36	2
37	54
38	6
39	8
40	6
41	30
42	1
43	24
44	15
45	4
46	3
47	6
48	4
49	18
50	3
51	2
52	6
53	120
54	2
55	12
56	48
57	4
58	6
59	18
60	1
61	258
62	21
63	14
64	3
65	30
66	3
67	24
68	15
69	2
70	6
71	18
72	1
73	84
74	27
75	2
76	3
77	6
78	4
79	132
80	3
81	10
82	15
83	54
84	5
85	12
86	12

cp's OEIS Frontend

A071558 Smallest k such that n*k + 1 and n*k - 1 are twin primes.

Table of values

List of values

A071558 Smallest k such that nk + 1 and nk - 1 are twin primes.

n	a(n)
1	4
2	2
3	2
4	1
5	6
6	1
7	6
8	9
9	2
10	3
11	18
12	1
13	24
14	3
15	2
16	12
17	6
18	1
19	12
20	3
21	2
22	9
23	6
24	3
25	6
26	12
27	4
28	15
29	12
30	1
31	42
32	6
33	6
34	3
35	12
36	2
37	54
38	6
39	8
40	6
41	30
42	1
43	24
44	15
45	4
46	3
47	6
48	4
49	18
50	3
51	2
52	6
53	120
54	2
55	12
56	48
57	4
58	6
59	18
60	1
61	258
62	21
63	14
64	3
65	30
66	3
67	24
68	15
69	2
70	6
71	18
72	1
73	84
74	27
75	2
76	3
77	6
78	4
79	132
80	3
81	10
82	15
83	54
84	5
85	12
86	12