A238278 - cp's OEIS frontend

A238278 a(n) = |{0 < k < n: the number of primes in the interval ((k-1)n, kn] and the number of primes in the interval (kn, (k+1)n] are both prime}|.

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	3
7	3
8	2
9	7
10	6
11	8
12	4
13	9
14	4
15	9
16	8
17	1
18	1
19	3
20	5
21	4
22	6
23	3
24	4
25	4
26	6
27	3
28	11
29	8
30	8
31	7
32	7
33	12
34	9
35	4
36	8
37	9
38	12
39	8
40	12
41	8
42	7
43	6
44	7
45	7
46	9
47	4
48	8
49	9
50	11
51	5
52	6
53	3
54	11
55	2
56	5
57	14
58	8
59	8
60	11
61	2
62	1
63	11
64	4
65	6
66	4
67	5
68	4
69	1
70	9
71	5
72	2
73	10
74	5
75	4
76	9
77	10
78	11
79	6
80	7

[0, 0, 0, 1, 1, 3, 3, 2, 7, 6, 8, 4, 9, 4, 9, 8, 1, 1, 3, 5, 4, 6, 3, 4, 4, 6, 3, 11, 8, 8, 7, 7, 12, 9, 4, 8, 9, 12, 8, 12, 8, 7, 6, 7, 7, 9, 4, 8, 9, 11, 5, 6, 3, 11, 2, 5, 14, 8, 8, 11, 2, 1, 11, 4, 6, 4, 5, 4, 1, 9, 5, 2, 10, 5, 4, 9, 10, 11, 6, 7]

cp's OEIS Frontend

A238278 a(n) = |{0 < k < n: the number of primes in the interval ((k-1)n, kn] and the number of primes in the interval (kn, (k+1)n] are both prime}|.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	3
7	3
8	2
9	7
10	6
11	8
12	4
13	9
14	4
15	9
16	8
17	1
18	1
19	3
20	5
21	4
22	6
23	3
24	4
25	4
26	6
27	3
28	11
29	8
30	8
31	7
32	7
33	12
34	9
35	4
36	8
37	9
38	12
39	8
40	12
41	8
42	7
43	6
44	7
45	7
46	9
47	4
48	8
49	9
50	11
51	5
52	6
53	3
54	11
55	2
56	5
57	14
58	8
59	8
60	11
61	2
62	1
63	11
64	4
65	6
66	4
67	5
68	4
69	1
70	9
71	5
72	2
73	10
74	5
75	4
76	9
77	10
78	11
79	6
80	7

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	3
7	3
8	2
9	7
10	6
11	8
12	4
13	9
14	4
15	9
16	8
17	1
18	1
19	3
20	5
21	4
22	6
23	3
24	4
25	4
26	6
27	3
28	11
29	8
30	8
31	7
32	7
33	12
34	9
35	4
36	8
37	9
38	12
39	8
40	12
41	8
42	7
43	6
44	7
45	7
46	9
47	4
48	8
49	9
50	11
51	5
52	6
53	3
54	11
55	2
56	5
57	14
58	8
59	8
60	11
61	2
62	1
63	11
64	4
65	6
66	4
67	5
68	4
69	1
70	9
71	5
72	2
73	10
74	5
75	4
76	9
77	10
78	11
79	6
80	7

cp's OEIS Frontend

A238278 a(n) = |{0 < k < n: the number of primes in the interval ((k-1)*n, k*n] and the number of primes in the interval (k*n, (k+1)*n] are both prime}|.

Table of values

List of values

A238278 a(n) = |{0 < k < n: the number of primes in the interval ((k-1)n, kn] and the number of primes in the interval (kn, (k+1)n] are both prime}|.

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	3
7	3
8	2
9	7
10	6
11	8
12	4
13	9
14	4
15	9
16	8
17	1
18	1
19	3
20	5
21	4
22	6
23	3
24	4
25	4
26	6
27	3
28	11
29	8
30	8
31	7
32	7
33	12
34	9
35	4
36	8
37	9
38	12
39	8
40	12
41	8
42	7
43	6
44	7
45	7
46	9
47	4
48	8
49	9
50	11
51	5
52	6
53	3
54	11
55	2
56	5
57	14
58	8
59	8
60	11
61	2
62	1
63	11
64	4
65	6
66	4
67	5
68	4
69	1
70	9
71	5
72	2
73	10
74	5
75	4
76	9
77	10
78	11
79	6
80	7