A289494 - cp's OEIS frontend

A289494 Number of primes in the interval [3n, 4n].

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

[1, 1, 1, 1, 2, 2, 1, 2, 2, 2, 3, 4, 3, 3, 3, 3, 4, 4, 5, 5, 5, 5, 5, 4, 4, 6, 6, 6, 7, 6, 6, 7, 7, 6, 7, 6, 5, 6, 6, 7, 8, 9, 8, 8, 9, 9, 8, 9, 10, 11, 10, 10, 10, 10, 9, 9, 10, 10, 11, 11, 11, 11, 12, 11, 11, 11, 10, 12, 12, 13, 14, 14, 14, 15, 14]

cp's OEIS Frontend

A289494 Number of primes in the interval [3n, 4n].

Table of values

List of values

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

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

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