A289498 - cp's OEIS frontend

A289498 Number of primes in the interval [7n, 8n].

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

[1, 0, 1, 2, 1, 2, 1, 2, 2, 3, 2, 1, 3, 4, 3, 2, 2, 4, 4, 3, 5, 4, 5, 4, 6, 4, 5, 4, 4, 6, 6, 6, 6, 7, 6, 7, 7, 6, 6, 7, 5, 5, 6, 7, 7, 7, 8, 9, 9, 8, 8, 8, 9, 9, 9, 9, 9, 11, 11, 11, 11, 10, 11, 11, 10, 10, 8, 9, 9, 9, 9, 9, 9, 10, 10, 12, 13, 14, 14, 13]

cp's OEIS Frontend

A289498 Number of primes in the interval [7n, 8n].

Table of values

List of values

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

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

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