A064659 - cp's OEIS frontend

A064659 a(n) = round(prime(n) - n*log(n)).

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

[2, 2, 2, 1, 3, 2, 3, 2, 3, 6, 5, 7, 8, 6, 6, 9, 11, 9, 11, 11, 9, 11, 11, 13, 17, 16, 14, 14, 11, 11, 21, 20, 22, 19, 25, 22, 23, 25, 24, 25, 27, 24, 29, 26, 26, 23, 30, 37, 36, 33, 32, 34, 31, 36, 37, 38, 39, 35, 36, 35, 32, 37, 46, 45, 42, 40, 49, 50, 55]

cp's OEIS Frontend

A064659 a(n) = round(prime(n) - n*log(n)).

Table of values

List of values

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

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

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