A321859 - cp's OEIS frontend

A321859 Number of primes congruent to 3, 5, 6 modulo 7 and <= n minus number of primes congruent to 1, 2, 4 modulo 7 and <= n.

n	a(n)
1	0
2	-1
3	0
4	0
5	1
6	1
7	1
8	1
9	1
10	1
11	0
12	0
13	1
14	1
15	1
16	1
17	2
18	2
19	3
20	3
21	3
22	3
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	2
42	2
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	3
62	3
63	3
64	3
65	3
66	3
67	2
68	2
69	2
70	2
71	1
72	1
73	2
74	2
75	2
76	2
77	2
78	2
79	1
80	1
81	1
82	1
83	2
84	2
85	2
86	2
87	2

[0, -1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2, 2]

cp's OEIS Frontend

A321859 Number of primes congruent to 3, 5, 6 modulo 7 and <= n minus number of primes congruent to 1, 2, 4 modulo 7 and <= n.

Table of values

List of values

n	a(n)
1	0
2	-1
3	0
4	0
5	1
6	1
7	1
8	1
9	1
10	1
11	0
12	0
13	1
14	1
15	1
16	1
17	2
18	2
19	3
20	3
21	3
22	3
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	2
42	2
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	3
62	3
63	3
64	3
65	3
66	3
67	2
68	2
69	2
70	2
71	1
72	1
73	2
74	2
75	2
76	2
77	2
78	2
79	1
80	1
81	1
82	1
83	2
84	2
85	2
86	2
87	2

n	a(n)
1	0
2	-1
3	0
4	0
5	1
6	1
7	1
8	1
9	1
10	1
11	0
12	0
13	1
14	1
15	1
16	1
17	2
18	2
19	3
20	3
21	3
22	3
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	2
42	2
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	3
62	3
63	3
64	3
65	3
66	3
67	2
68	2
69	2
70	2
71	1
72	1
73	2
74	2
75	2
76	2
77	2
78	2
79	1
80	1
81	1
82	1
83	2
84	2
85	2
86	2
87	2

n	a(n)
1	0
2	-1
3	0
4	0
5	1
6	1
7	1
8	1
9	1
10	1
11	0
12	0
13	1
14	1
15	1
16	1
17	2
18	2
19	3
20	3
21	3
22	3
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	2
42	2
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	3
62	3
63	3
64	3
65	3
66	3
67	2
68	2
69	2
70	2
71	1
72	1
73	2
74	2
75	2
76	2
77	2
78	2
79	1
80	1
81	1
82	1
83	2
84	2
85	2
86	2
87	2