A064662 - cp's OEIS frontend

A064662 a(n) = n - round( prime(n)/log(prime(n)) ).

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

[-2, -1, 0, 0, 0, 1, 1, 2, 2, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 6, 6, 5, 5, 5, 6, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 7, 7, 8, 8, 8, 9, 9, 9, 9, 9, 10, 10, 10, 11, 10, 9, 10, 11, 11, 10, 10, 10, 10, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12]

cp's OEIS Frontend

A064662 a(n) = n - round( prime(n)/log(prime(n)) ).

Table of values

List of values

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

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

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