A110049 - cp's OEIS frontend

A110049 a(n) is the least j such that (prime(n)#)*3^j + 1 is prime, where prime(n)# is the n-th primorial.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	2
7	3
8	3
9	3
10	3
11	0
12	5
13	8
14	4
15	10
16	1
17	4
18	2
19	5
20	1
21	11
22	7
23	1
24	2
25	6
26	6
27	11
28	2
29	9
30	10
31	18
32	9
33	32
34	3
35	8
36	18
37	15
38	3
39	18
40	1
41	18
42	4
43	2
44	24
45	14
46	32
47	149
48	12
49	1
50	67
51	49
52	56
53	1
54	12
55	10
56	15
57	3
58	7
59	17
60	5

[0, 0, 0, 0, 0, 2, 3, 3, 3, 3, 0, 5, 8, 4, 10, 1, 4, 2, 5, 1, 11, 7, 1, 2, 6, 6, 11, 2, 9, 10, 18, 9, 32, 3, 8, 18, 15, 3, 18, 1, 18, 4, 2, 24, 14, 32, 149, 12, 1, 67, 49, 56, 1, 12, 10, 15, 3, 7, 17, 5]

cp's OEIS Frontend

A110049 a(n) is the least j such that (prime(n)#)*3^j + 1 is prime, where prime(n)# is the n-th primorial.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	2
7	3
8	3
9	3
10	3
11	0
12	5
13	8
14	4
15	10
16	1
17	4
18	2
19	5
20	1
21	11
22	7
23	1
24	2
25	6
26	6
27	11
28	2
29	9
30	10
31	18
32	9
33	32
34	3
35	8
36	18
37	15
38	3
39	18
40	1
41	18
42	4
43	2
44	24
45	14
46	32
47	149
48	12
49	1
50	67
51	49
52	56
53	1
54	12
55	10
56	15
57	3
58	7
59	17
60	5

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	2
7	3
8	3
9	3
10	3
11	0
12	5
13	8
14	4
15	10
16	1
17	4
18	2
19	5
20	1
21	11
22	7
23	1
24	2
25	6
26	6
27	11
28	2
29	9
30	10
31	18
32	9
33	32
34	3
35	8
36	18
37	15
38	3
39	18
40	1
41	18
42	4
43	2
44	24
45	14
46	32
47	149
48	12
49	1
50	67
51	49
52	56
53	1
54	12
55	10
56	15
57	3
58	7
59	17
60	5

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	2
7	3
8	3
9	3
10	3
11	0
12	5
13	8
14	4
15	10
16	1
17	4
18	2
19	5
20	1
21	11
22	7
23	1
24	2
25	6
26	6
27	11
28	2
29	9
30	10
31	18
32	9
33	32
34	3
35	8
36	18
37	15
38	3
39	18
40	1
41	18
42	4
43	2
44	24
45	14
46	32
47	149
48	12
49	1
50	67
51	49
52	56
53	1
54	12
55	10
56	15
57	3
58	7
59	17
60	5