A102613 - cp's OEIS frontend

A102613 Numerator of the reduced fractions of the ratios of the number of primes less than n over the number of composites less than n.

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

[0, 1, 2, 1, 3, 1, 4, 1, 4, 2, 5, 5, 6, 3, 2, 3, 7, 7, 8, 2, 8, 4, 9, 3, 9, 9, 1, 9, 10, 1, 11, 11, 1, 11, 11, 11, 12, 6, 4, 3, 13, 13, 14, 7, 14, 7, 15, 5, 15, 3, 5, 15, 16, 8, 16, 2, 16, 8, 17, 17, 18, 9, 2, 9, 18, 3, 19, 19, 19, 19, 20, 5, 21, 21, 7, 21, 3, 7, 22, 11, 22, 11, 23, 23, 23, 23]

cp's OEIS Frontend

A102613 Numerator of the reduced fractions of the ratios of the number of primes less than n over the number of composites less than n.

Table of values

List of values

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

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

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