A329242 - cp's OEIS frontend

A329242 a(n) = Pi(8,3)(n) + Pi(8,5)(n) + Pi(8,7)(n) - 3Pi(8,1)(n), where Pi(a,b)(x) denotes the number of primes in the arithmetic progression ak + b less than or equal to x.

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

[0, 0, 1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 5, 5, 5, 5, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 10]

cp's OEIS Frontend

A329242 a(n) = Pi(8,3)(n) + Pi(8,5)(n) + Pi(8,7)(n) - 3Pi(8,1)(n), where Pi(a,b)(x) denotes the number of primes in the arithmetic progression ak + b less than or equal to x.

Table of values

List of values

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

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

cp's OEIS Frontend

A329242 a(n) = Pi(8,3)(n) + Pi(8,5)(n) + Pi(8,7)(n) - 3*Pi(8,1)(n), where Pi(a,b)(x) denotes the number of primes in the arithmetic progression a*k + b less than or equal to x.

Table of values

List of values

A329242 a(n) = Pi(8,3)(n) + Pi(8,5)(n) + Pi(8,7)(n) - 3Pi(8,1)(n), where Pi(a,b)(x) denotes the number of primes in the arithmetic progression ak + b less than or equal to x.

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