A218850 - cp's OEIS frontend

A218850 a(n) is the least r > 1 for which the interval (r(2n-1), r(2n+1)) contains no prime, or 0 if no such r exists.

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

[0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 5, 0, 2, 4, 2, 0, 4, 2, 3, 0, 0, 2, 3, 6, 0, 4, 0, 2, 2, 2, 0, 0, 3, 0, 2, 0, 7, 0, 2, 3, 16, 0, 2, 0, 2, 2, 3, 0, 3, 2, 2, 5, 2, 2, 8, 3, 0, 2, 0, 2, 2, 0, 7, 2, 4, 4, 0, 3, 0]

cp's OEIS Frontend

A218850 a(n) is the least r > 1 for which the interval (r(2n-1), r(2n+1)) contains no prime, or 0 if no such r exists.

Table of values

List of values

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

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

cp's OEIS Frontend

A218850 a(n) is the least r > 1 for which the interval (r*(2*n-1), r*(2*n+1)) contains no prime, or 0 if no such r exists.

Table of values

List of values

A218850 a(n) is the least r > 1 for which the interval (r(2n-1), r(2n+1)) contains no prime, or 0 if no such r exists.

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