A143223 - cp's OEIS frontend

A143223 (Number of primes between n^2 and (n+1)^2) - (number of primes between n and 2n).

n	a(n)
0	0
1	2
2	1
3	1
4	1
5	1
6	2
7	1
8	2
9	0
10	1
11	1
12	1
13	2
14	1
15	2
16	2
17	1
18	2
19	2
20	3
21	2
22	1
23	1
24	3
25	2
26	1
27	1
28	2
29	2
30	1
31	3
32	2
33	3
34	1
35	2
36	0
37	0
38	3
39	2
40	2
41	2
42	-1
43	3
44	2
45	3
46	0
47	4
48	6
49	0
50	1
51	4
52	4
53	1
54	1
55	-2
56	-1
57	3
58	-1
59	3
60	3
61	1
62	5
63	3
64	1
65	3
66	1
67	2
68	4
69	-1
70	6
71	1
72	1
73	4
74	4
75	4
76	7
77	-1
78	3
79	8
80	-2
81	5
82	3
83	5
84	1
85	0
86	5
87	5
88	1
89	2
90	3
91	2
92	1
93	5
94	3
95	3
96	2
97	3
98	4
99	1
100	2

[0, 2, 1, 1, 1, 1, 2, 1, 2, 0, 1, 1, 1, 2, 1, 2, 2, 1, 2, 2, 3, 2, 1, 1, 3, 2, 1, 1, 2, 2, 1, 3, 2, 3, 1, 2, 0, 0, 3, 2, 2, 2, -1, 3, 2, 3, 0, 4, 6, 0, 1, 4, 4, 1, 1, -2, -1, 3, -1, 3, 3, 1, 5, 3, 1, 3, 1, 2, 4, -1, 6, 1, 1, 4, 4, 4, 7, -1, 3, 8, -2, 5, 3, 5, 1, 0, 5, 5, 1, 2, 3, 2, 1, 5, 3, 3, 2, 3, 4, 1, 2]

cp's OEIS Frontend

A143223 (Number of primes between n^2 and (n+1)^2) - (number of primes between n and 2n).

Table of values

List of values

n	a(n)
0	0
1	2
2	1
3	1
4	1
5	1
6	2
7	1
8	2
9	0
10	1
11	1
12	1
13	2
14	1
15	2
16	2
17	1
18	2
19	2
20	3
21	2
22	1
23	1
24	3
25	2
26	1
27	1
28	2
29	2
30	1
31	3
32	2
33	3
34	1
35	2
36	0
37	0
38	3
39	2
40	2
41	2
42	-1
43	3
44	2
45	3
46	0
47	4
48	6
49	0
50	1
51	4
52	4
53	1
54	1
55	-2
56	-1
57	3
58	-1
59	3
60	3
61	1
62	5
63	3
64	1
65	3
66	1
67	2
68	4
69	-1
70	6
71	1
72	1
73	4
74	4
75	4
76	7
77	-1
78	3
79	8
80	-2
81	5
82	3
83	5
84	1
85	0
86	5
87	5
88	1
89	2
90	3
91	2
92	1
93	5
94	3
95	3
96	2
97	3
98	4
99	1
100	2

n	a(n)
0	0
1	2
2	1
3	1
4	1
5	1
6	2
7	1
8	2
9	0
10	1
11	1
12	1
13	2
14	1
15	2
16	2
17	1
18	2
19	2
20	3
21	2
22	1
23	1
24	3
25	2
26	1
27	1
28	2
29	2
30	1
31	3
32	2
33	3
34	1
35	2
36	0
37	0
38	3
39	2
40	2
41	2
42	-1
43	3
44	2
45	3
46	0
47	4
48	6
49	0
50	1
51	4
52	4
53	1
54	1
55	-2
56	-1
57	3
58	-1
59	3
60	3
61	1
62	5
63	3
64	1
65	3
66	1
67	2
68	4
69	-1
70	6
71	1
72	1
73	4
74	4
75	4
76	7
77	-1
78	3
79	8
80	-2
81	5
82	3
83	5
84	1
85	0
86	5
87	5
88	1
89	2
90	3
91	2
92	1
93	5
94	3
95	3
96	2
97	3
98	4
99	1
100	2

n	a(n)
0	0
1	2
2	1
3	1
4	1
5	1
6	2
7	1
8	2
9	0
10	1
11	1
12	1
13	2
14	1
15	2
16	2
17	1
18	2
19	2
20	3
21	2
22	1
23	1
24	3
25	2
26	1
27	1
28	2
29	2
30	1
31	3
32	2
33	3
34	1
35	2
36	0
37	0
38	3
39	2
40	2
41	2
42	-1
43	3
44	2
45	3
46	0
47	4
48	6
49	0
50	1
51	4
52	4
53	1
54	1
55	-2
56	-1
57	3
58	-1
59	3
60	3
61	1
62	5
63	3
64	1
65	3
66	1
67	2
68	4
69	-1
70	6
71	1
72	1
73	4
74	4
75	4
76	7
77	-1
78	3
79	8
80	-2
81	5
82	3
83	5
84	1
85	0
86	5
87	5
88	1
89	2
90	3
91	2
92	1
93	5
94	3
95	3
96	2
97	3
98	4
99	1
100	2