A066520 - cp's OEIS frontend

A066520 Number of primes of the form 4m+3 <= n minus number of primes of the form 4m+1 <= n.

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

[0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 2]

cp's OEIS Frontend

A066520 Number of primes of the form 4m+3 <= n minus number of primes of the form 4m+1 <= n.

Table of values

List of values

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

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

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