A214500 - cp's OEIS frontend

A214500 The size of the set of numbers k>=0 such that all (3^n+k)3^n-1 are prime but only the last (largest) (3^n+k)3^n+1 is also an associated twin prime.

n	a(n)
1	1
2	2
3	1
4	2
5	3
6	3
7	9
8	3
9	4
10	1
11	8
12	20
13	4
14	10
15	24
16	8
17	17
18	9
19	28
20	16
21	19
22	6
23	33
24	19
25	12
26	5
27	49
28	27
29	25
30	26
31	10
32	91
33	143
34	9
35	41
36	14
37	36
38	11
39	34
40	26
41	28
42	10
43	50
44	7
45	12
46	11
47	8
48	27
49	13
50	4
51	44
52	138
53	50
54	10
55	45
56	21
57	51
58	84
59	65
60	48
61	39
62	139
63	36
64	19
65	22
66	85
67	113
68	105
69	5
70	36

[1, 2, 1, 2, 3, 3, 9, 3, 4, 1, 8, 20, 4, 10, 24, 8, 17, 9, 28, 16, 19, 6, 33, 19, 12, 5, 49, 27, 25, 26, 10, 91, 143, 9, 41, 14, 36, 11, 34, 26, 28, 10, 50, 7, 12, 11, 8, 27, 13, 4, 44, 138, 50, 10, 45, 21, 51, 84, 65, 48, 39, 139, 36, 19, 22, 85, 113, 105, 5, 36]

cp's OEIS Frontend

A214500 The size of the set of numbers k>=0 such that all (3^n+k)3^n-1 are prime but only the last (largest) (3^n+k)3^n+1 is also an associated twin prime.

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	2
5	3
6	3
7	9
8	3
9	4
10	1
11	8
12	20
13	4
14	10
15	24
16	8
17	17
18	9
19	28
20	16
21	19
22	6
23	33
24	19
25	12
26	5
27	49
28	27
29	25
30	26
31	10
32	91
33	143
34	9
35	41
36	14
37	36
38	11
39	34
40	26
41	28
42	10
43	50
44	7
45	12
46	11
47	8
48	27
49	13
50	4
51	44
52	138
53	50
54	10
55	45
56	21
57	51
58	84
59	65
60	48
61	39
62	139
63	36
64	19
65	22
66	85
67	113
68	105
69	5
70	36

n	a(n)
1	1
2	2
3	1
4	2
5	3
6	3
7	9
8	3
9	4
10	1
11	8
12	20
13	4
14	10
15	24
16	8
17	17
18	9
19	28
20	16
21	19
22	6
23	33
24	19
25	12
26	5
27	49
28	27
29	25
30	26
31	10
32	91
33	143
34	9
35	41
36	14
37	36
38	11
39	34
40	26
41	28
42	10
43	50
44	7
45	12
46	11
47	8
48	27
49	13
50	4
51	44
52	138
53	50
54	10
55	45
56	21
57	51
58	84
59	65
60	48
61	39
62	139
63	36
64	19
65	22
66	85
67	113
68	105
69	5
70	36

cp's OEIS Frontend

A214500 The size of the set of numbers k>=0 such that all (3^n+k)*3^n-1 are prime but only the last (largest) (3^n+k)*3^n+1 is also an associated twin prime.

Table of values

List of values

A214500 The size of the set of numbers k>=0 such that all (3^n+k)3^n-1 are prime but only the last (largest) (3^n+k)3^n+1 is also an associated twin prime.

n	a(n)
1	1
2	2
3	1
4	2
5	3
6	3
7	9
8	3
9	4
10	1
11	8
12	20
13	4
14	10
15	24
16	8
17	17
18	9
19	28
20	16
21	19
22	6
23	33
24	19
25	12
26	5
27	49
28	27
29	25
30	26
31	10
32	91
33	143
34	9
35	41
36	14
37	36
38	11
39	34
40	26
41	28
42	10
43	50
44	7
45	12
46	11
47	8
48	27
49	13
50	4
51	44
52	138
53	50
54	10
55	45
56	21
57	51
58	84
59	65
60	48
61	39
62	139
63	36
64	19
65	22
66	85
67	113
68	105
69	5
70	36