A087010 - cp's OEIS frontend

A087010 Number of primes of form 4*k+1 between n and 2n (inclusive).

n	a(n)
1	0
2	0
3	1
4	1
5	1
6	0
7	1
8	1
9	2
10	2
11	2
12	2
13	2
14	1
15	2
16	2
17	2
18	1
19	2
20	2
21	3
22	3
23	3
24	3
25	3
26	3
27	4
28	4
29	4
30	3
31	4
32	4
33	4
34	4
35	4
36	4
37	5
38	4
39	4
40	4
41	4
42	3
43	3
44	3
45	4
46	4
47	4
48	4
49	5
50	5
51	6
52	6
53	6
54	5
55	6
56	6
57	7
58	7
59	7
60	7
61	7
62	6
63	6
64	6
65	6
66	6
67	6
68	6
69	7
70	7
71	7
72	7
73	7
74	6
75	7
76	7
77	7
78	7
79	8
80	8
81	8
82	8
83	8
84	8
85	8
86	8
87	9
88	9
89	9
90	8
91	9
92	9
93	9
94	9
95	9
96	9
97	10
98	9
99	10
100	10
101	10
102	9
103	9

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

cp's OEIS Frontend

A087010 Number of primes of form 4*k+1 between n and 2n (inclusive).

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	1
5	1
6	0
7	1
8	1
9	2
10	2
11	2
12	2
13	2
14	1
15	2
16	2
17	2
18	1
19	2
20	2
21	3
22	3
23	3
24	3
25	3
26	3
27	4
28	4
29	4
30	3
31	4
32	4
33	4
34	4
35	4
36	4
37	5
38	4
39	4
40	4
41	4
42	3
43	3
44	3
45	4
46	4
47	4
48	4
49	5
50	5
51	6
52	6
53	6
54	5
55	6
56	6
57	7
58	7
59	7
60	7
61	7
62	6
63	6
64	6
65	6
66	6
67	6
68	6
69	7
70	7
71	7
72	7
73	7
74	6
75	7
76	7
77	7
78	7
79	8
80	8
81	8
82	8
83	8
84	8
85	8
86	8
87	9
88	9
89	9
90	8
91	9
92	9
93	9
94	9
95	9
96	9
97	10
98	9
99	10
100	10
101	10
102	9
103	9

n	a(n)
1	0
2	0
3	1
4	1
5	1
6	0
7	1
8	1
9	2
10	2
11	2
12	2
13	2
14	1
15	2
16	2
17	2
18	1
19	2
20	2
21	3
22	3
23	3
24	3
25	3
26	3
27	4
28	4
29	4
30	3
31	4
32	4
33	4
34	4
35	4
36	4
37	5
38	4
39	4
40	4
41	4
42	3
43	3
44	3
45	4
46	4
47	4
48	4
49	5
50	5
51	6
52	6
53	6
54	5
55	6
56	6
57	7
58	7
59	7
60	7
61	7
62	6
63	6
64	6
65	6
66	6
67	6
68	6
69	7
70	7
71	7
72	7
73	7
74	6
75	7
76	7
77	7
78	7
79	8
80	8
81	8
82	8
83	8
84	8
85	8
86	8
87	9
88	9
89	9
90	8
91	9
92	9
93	9
94	9
95	9
96	9
97	10
98	9
99	10
100	10
101	10
102	9
103	9

n	a(n)
1	0
2	0
3	1
4	1
5	1
6	0
7	1
8	1
9	2
10	2
11	2
12	2
13	2
14	1
15	2
16	2
17	2
18	1
19	2
20	2
21	3
22	3
23	3
24	3
25	3
26	3
27	4
28	4
29	4
30	3
31	4
32	4
33	4
34	4
35	4
36	4
37	5
38	4
39	4
40	4
41	4
42	3
43	3
44	3
45	4
46	4
47	4
48	4
49	5
50	5
51	6
52	6
53	6
54	5
55	6
56	6
57	7
58	7
59	7
60	7
61	7
62	6
63	6
64	6
65	6
66	6
67	6
68	6
69	7
70	7
71	7
72	7
73	7
74	6
75	7
76	7
77	7
78	7
79	8
80	8
81	8
82	8
83	8
84	8
85	8
86	8
87	9
88	9
89	9
90	8
91	9
92	9
93	9
94	9
95	9
96	9
97	10
98	9
99	10
100	10
101	10
102	9
103	9