A143227 - cp's OEIS frontend

A143227 (Number of primes between n and 2n) - (number of primes between n^2 and (n+1)^2), if > 0.

n	a(n)
1	1
2	2
3	1
4	1
5	1
6	1
7	2
8	2
9	3
10	3
11	3
12	1
13	1
14	1
15	1
16	1
17	2
18	2
19	1
20	1
21	1
22	2
23	2
24	1
25	1
26	3
27	2
28	1
29	1
30	2
31	2
32	6
33	3
34	3
35	1
36	1
37	1
38	2
39	1
40	1
41	1
42	1
43	6
44	3
45	8
46	3
47	2
48	3
49	2
50	3
51	1
52	1
53	4
54	3
55	10
56	2
57	1
58	1
59	2
60	3
61	1
62	3
63	4
64	2
65	2
66	9
67	7
68	2
69	2
70	4
71	3
72	3
73	1
74	2
75	3
76	5
77	1
78	2
79	3
80	2
81	11
82	3
83	1
84	2
85	4
86	7
87	1
88	1
89	1
90	1
91	1
92	5
93	1
94	2
95	3
96	3
97	4
98	2
99	2
100	9
101	5
102	1
103	4
104	2
105	2

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

cp's OEIS Frontend

A143227 (Number of primes between n and 2n) - (number of primes between n^2 and (n+1)^2), if > 0.

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	1
5	1
6	1
7	2
8	2
9	3
10	3
11	3
12	1
13	1
14	1
15	1
16	1
17	2
18	2
19	1
20	1
21	1
22	2
23	2
24	1
25	1
26	3
27	2
28	1
29	1
30	2
31	2
32	6
33	3
34	3
35	1
36	1
37	1
38	2
39	1
40	1
41	1
42	1
43	6
44	3
45	8
46	3
47	2
48	3
49	2
50	3
51	1
52	1
53	4
54	3
55	10
56	2
57	1
58	1
59	2
60	3
61	1
62	3
63	4
64	2
65	2
66	9
67	7
68	2
69	2
70	4
71	3
72	3
73	1
74	2
75	3
76	5
77	1
78	2
79	3
80	2
81	11
82	3
83	1
84	2
85	4
86	7
87	1
88	1
89	1
90	1
91	1
92	5
93	1
94	2
95	3
96	3
97	4
98	2
99	2
100	9
101	5
102	1
103	4
104	2
105	2

n	a(n)
1	1
2	2
3	1
4	1
5	1
6	1
7	2
8	2
9	3
10	3
11	3
12	1
13	1
14	1
15	1
16	1
17	2
18	2
19	1
20	1
21	1
22	2
23	2
24	1
25	1
26	3
27	2
28	1
29	1
30	2
31	2
32	6
33	3
34	3
35	1
36	1
37	1
38	2
39	1
40	1
41	1
42	1
43	6
44	3
45	8
46	3
47	2
48	3
49	2
50	3
51	1
52	1
53	4
54	3
55	10
56	2
57	1
58	1
59	2
60	3
61	1
62	3
63	4
64	2
65	2
66	9
67	7
68	2
69	2
70	4
71	3
72	3
73	1
74	2
75	3
76	5
77	1
78	2
79	3
80	2
81	11
82	3
83	1
84	2
85	4
86	7
87	1
88	1
89	1
90	1
91	1
92	5
93	1
94	2
95	3
96	3
97	4
98	2
99	2
100	9
101	5
102	1
103	4
104	2
105	2

n	a(n)
1	1
2	2
3	1
4	1
5	1
6	1
7	2
8	2
9	3
10	3
11	3
12	1
13	1
14	1
15	1
16	1
17	2
18	2
19	1
20	1
21	1
22	2
23	2
24	1
25	1
26	3
27	2
28	1
29	1
30	2
31	2
32	6
33	3
34	3
35	1
36	1
37	1
38	2
39	1
40	1
41	1
42	1
43	6
44	3
45	8
46	3
47	2
48	3
49	2
50	3
51	1
52	1
53	4
54	3
55	10
56	2
57	1
58	1
59	2
60	3
61	1
62	3
63	4
64	2
65	2
66	9
67	7
68	2
69	2
70	4
71	3
72	3
73	1
74	2
75	3
76	5
77	1
78	2
79	3
80	2
81	11
82	3
83	1
84	2
85	4
86	7
87	1
88	1
89	1
90	1
91	1
92	5
93	1
94	2
95	3
96	3
97	4
98	2
99	2
100	9
101	5
102	1
103	4
104	2
105	2