A289495 - cp's OEIS frontend

A289495 Number of primes in the interval [4n, 5n].

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

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

cp's OEIS Frontend

A289495 Number of primes in the interval [4n, 5n].

Table of values

List of values

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

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

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