A090189 - cp's OEIS frontend

A090189 Least k such that k*p(n)#-p(n+1) is prime, where p(i)# denotes the i-th primorial and p(i) denotes the i-th prime.

n	a(n)
1	3
2	2
3	1
4	1
5	1
6	1
7	2
8	1
9	3
10	5
11	2
12	4
13	6
14	3
15	5
16	7
17	26
18	5
19	7
20	11
21	10
22	1
23	1
24	1
25	11
26	5
27	3
28	8
29	3
30	20
31	14
32	4
33	2
34	39
35	1
36	16
37	4
38	6
39	3
40	56
41	8
42	7
43	17
44	14
45	4
46	21
47	7
48	13
49	13
50	22
51	30
52	10
53	22
54	6
55	2
56	43
57	3
58	17
59	26
60	21
61	32
62	10
63	28
64	30
65	15
66	28
67	22
68	74
69	23
70	33
71	11
72	8
73	1
74	4
75	3
76	5
77	2
78	29
79	3
80	68
81	36
82	14
83	1
84	133
85	4

[3, 2, 1, 1, 1, 1, 2, 1, 3, 5, 2, 4, 6, 3, 5, 7, 26, 5, 7, 11, 10, 1, 1, 1, 11, 5, 3, 8, 3, 20, 14, 4, 2, 39, 1, 16, 4, 6, 3, 56, 8, 7, 17, 14, 4, 21, 7, 13, 13, 22, 30, 10, 22, 6, 2, 43, 3, 17, 26, 21, 32, 10, 28, 30, 15, 28, 22, 74, 23, 33, 11, 8, 1, 4, 3, 5, 2, 29, 3, 68, 36, 14, 1, 133, 4]

cp's OEIS Frontend

A090189 Least k such that k*p(n)#-p(n+1) is prime, where p(i)# denotes the i-th primorial and p(i) denotes the i-th prime.

Table of values

List of values

n	a(n)
1	3
2	2
3	1
4	1
5	1
6	1
7	2
8	1
9	3
10	5
11	2
12	4
13	6
14	3
15	5
16	7
17	26
18	5
19	7
20	11
21	10
22	1
23	1
24	1
25	11
26	5
27	3
28	8
29	3
30	20
31	14
32	4
33	2
34	39
35	1
36	16
37	4
38	6
39	3
40	56
41	8
42	7
43	17
44	14
45	4
46	21
47	7
48	13
49	13
50	22
51	30
52	10
53	22
54	6
55	2
56	43
57	3
58	17
59	26
60	21
61	32
62	10
63	28
64	30
65	15
66	28
67	22
68	74
69	23
70	33
71	11
72	8
73	1
74	4
75	3
76	5
77	2
78	29
79	3
80	68
81	36
82	14
83	1
84	133
85	4

n	a(n)
1	3
2	2
3	1
4	1
5	1
6	1
7	2
8	1
9	3
10	5
11	2
12	4
13	6
14	3
15	5
16	7
17	26
18	5
19	7
20	11
21	10
22	1
23	1
24	1
25	11
26	5
27	3
28	8
29	3
30	20
31	14
32	4
33	2
34	39
35	1
36	16
37	4
38	6
39	3
40	56
41	8
42	7
43	17
44	14
45	4
46	21
47	7
48	13
49	13
50	22
51	30
52	10
53	22
54	6
55	2
56	43
57	3
58	17
59	26
60	21
61	32
62	10
63	28
64	30
65	15
66	28
67	22
68	74
69	23
70	33
71	11
72	8
73	1
74	4
75	3
76	5
77	2
78	29
79	3
80	68
81	36
82	14
83	1
84	133
85	4

n	a(n)
1	3
2	2
3	1
4	1
5	1
6	1
7	2
8	1
9	3
10	5
11	2
12	4
13	6
14	3
15	5
16	7
17	26
18	5
19	7
20	11
21	10
22	1
23	1
24	1
25	11
26	5
27	3
28	8
29	3
30	20
31	14
32	4
33	2
34	39
35	1
36	16
37	4
38	6
39	3
40	56
41	8
42	7
43	17
44	14
45	4
46	21
47	7
48	13
49	13
50	22
51	30
52	10
53	22
54	6
55	2
56	43
57	3
58	17
59	26
60	21
61	32
62	10
63	28
64	30
65	15
66	28
67	22
68	74
69	23
70	33
71	11
72	8
73	1
74	4
75	3
76	5
77	2
78	29
79	3
80	68
81	36
82	14
83	1
84	133
85	4