A038627 - cp's OEIS frontend

A038627 Number of solutions x to n * pi(x) = x, where pi(x) = number of primes <= x.

n	a(n)
1	0
2	4
3	3
4	3
5	6
6	7
7	6
8	6
9	3
10	9
11	1
12	18
13	11
14	12
15	21
16	3
17	10
18	33
19	31
20	32
21	24
22	8
23	13
24	32
25	35
26	4
27	15
28	9
29	15
30	26
31	22
32	24
33	9
34	3
35	14
36	55
37	36
38	3
39	65
40	52
41	33
42	139
43	42
44	2
45	85
46	25
47	7
48	96
49	16
50	33

[0, 4, 3, 3, 6, 7, 6, 6, 3, 9, 1, 18, 11, 12, 21, 3, 10, 33, 31, 32, 24, 8, 13, 32, 35, 4, 15, 9, 15, 26, 22, 24, 9, 3, 14, 55, 36, 3, 65, 52, 33, 139, 42, 2, 85, 25, 7, 96, 16, 33]

cp's OEIS Frontend

A038627 Number of solutions x to n * pi(x) = x, where pi(x) = number of primes <= x.

Table of values

List of values

n	a(n)
1	0
2	4
3	3
4	3
5	6
6	7
7	6
8	6
9	3
10	9
11	1
12	18
13	11
14	12
15	21
16	3
17	10
18	33
19	31
20	32
21	24
22	8
23	13
24	32
25	35
26	4
27	15
28	9
29	15
30	26
31	22
32	24
33	9
34	3
35	14
36	55
37	36
38	3
39	65
40	52
41	33
42	139
43	42
44	2
45	85
46	25
47	7
48	96
49	16
50	33

n	a(n)
1	0
2	4
3	3
4	3
5	6
6	7
7	6
8	6
9	3
10	9
11	1
12	18
13	11
14	12
15	21
16	3
17	10
18	33
19	31
20	32
21	24
22	8
23	13
24	32
25	35
26	4
27	15
28	9
29	15
30	26
31	22
32	24
33	9
34	3
35	14
36	55
37	36
38	3
39	65
40	52
41	33
42	139
43	42
44	2
45	85
46	25
47	7
48	96
49	16
50	33

n	a(n)
1	0
2	4
3	3
4	3
5	6
6	7
7	6
8	6
9	3
10	9
11	1
12	18
13	11
14	12
15	21
16	3
17	10
18	33
19	31
20	32
21	24
22	8
23	13
24	32
25	35
26	4
27	15
28	9
29	15
30	26
31	22
32	24
33	9
34	3
35	14
36	55
37	36
38	3
39	65
40	52
41	33
42	139
43	42
44	2
45	85
46	25
47	7
48	96
49	16
50	33