A239676 - cp's OEIS frontend

A239676 Least k such that k*3^n+1 is prime.

n	a(n)
0	1
1	2
2	2
3	4
4	2
5	2
6	2
7	8
8	6
9	2
10	8
11	28
12	10
13	12
14	4
15	4
16	2
17	2
18	10
19	20
20	26
21	24
22	8
23	48
24	16
25	34
26	14
27	14
28	18
29	6
30	2
31	26
32	26
33	14
34	22
35	26
36	16
37	22
38	12
39	4
40	62
41	64
42	68
43	88
44	70
45	56
46	34
47	96
48	32
49	50
50	20
51	24
52	8
53	6
54	2
55	18
56	6
57	2
58	8
59	6
60	2
61	42
62	14
63	18
64	6
65	2
66	98
67	66
68	22
69	70
70	74
71	80
72	68
73	52

[1, 2, 2, 4, 2, 2, 2, 8, 6, 2, 8, 28, 10, 12, 4, 4, 2, 2, 10, 20, 26, 24, 8, 48, 16, 34, 14, 14, 18, 6, 2, 26, 26, 14, 22, 26, 16, 22, 12, 4, 62, 64, 68, 88, 70, 56, 34, 96, 32, 50, 20, 24, 8, 6, 2, 18, 6, 2, 8, 6, 2, 42, 14, 18, 6, 2, 98, 66, 22, 70, 74, 80, 68, 52]

cp's OEIS Frontend

A239676 Least k such that k*3^n+1 is prime.

Table of values

List of values

n	a(n)
0	1
1	2
2	2
3	4
4	2
5	2
6	2
7	8
8	6
9	2
10	8
11	28
12	10
13	12
14	4
15	4
16	2
17	2
18	10
19	20
20	26
21	24
22	8
23	48
24	16
25	34
26	14
27	14
28	18
29	6
30	2
31	26
32	26
33	14
34	22
35	26
36	16
37	22
38	12
39	4
40	62
41	64
42	68
43	88
44	70
45	56
46	34
47	96
48	32
49	50
50	20
51	24
52	8
53	6
54	2
55	18
56	6
57	2
58	8
59	6
60	2
61	42
62	14
63	18
64	6
65	2
66	98
67	66
68	22
69	70
70	74
71	80
72	68
73	52

n	a(n)
0	1
1	2
2	2
3	4
4	2
5	2
6	2
7	8
8	6
9	2
10	8
11	28
12	10
13	12
14	4
15	4
16	2
17	2
18	10
19	20
20	26
21	24
22	8
23	48
24	16
25	34
26	14
27	14
28	18
29	6
30	2
31	26
32	26
33	14
34	22
35	26
36	16
37	22
38	12
39	4
40	62
41	64
42	68
43	88
44	70
45	56
46	34
47	96
48	32
49	50
50	20
51	24
52	8
53	6
54	2
55	18
56	6
57	2
58	8
59	6
60	2
61	42
62	14
63	18
64	6
65	2
66	98
67	66
68	22
69	70
70	74
71	80
72	68
73	52

n	a(n)
0	1
1	2
2	2
3	4
4	2
5	2
6	2
7	8
8	6
9	2
10	8
11	28
12	10
13	12
14	4
15	4
16	2
17	2
18	10
19	20
20	26
21	24
22	8
23	48
24	16
25	34
26	14
27	14
28	18
29	6
30	2
31	26
32	26
33	14
34	22
35	26
36	16
37	22
38	12
39	4
40	62
41	64
42	68
43	88
44	70
45	56
46	34
47	96
48	32
49	50
50	20
51	24
52	8
53	6
54	2
55	18
56	6
57	2
58	8
59	6
60	2
61	42
62	14
63	18
64	6
65	2
66	98
67	66
68	22
69	70
70	74
71	80
72	68
73	52