A161621 - cp's OEIS frontend

A161621 Numerator of (b(n+1) - b(n))/(b(n+2) - b(n)), where b(n) = A038107(n) is the number of primes up to n^2.

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

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

cp's OEIS Frontend

A161621 Numerator of (b(n+1) - b(n))/(b(n+2) - b(n)), where b(n) = A038107(n) is the number of primes up to n^2.

Table of values

List of values

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

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

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