A340313 - cp's OEIS frontend

A340313 The n-th squarefree number is the a(n)-th squarefree number having its number of primes.

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

[1, 1, 2, 3, 1, 4, 2, 5, 6, 3, 4, 7, 8, 5, 6, 9, 7, 10, 1, 11, 8, 9, 10, 12, 11, 12, 13, 2, 14, 13, 15, 14, 16, 15, 16, 17, 17, 18, 18, 19, 3, 19, 20, 4, 20, 21, 21, 22, 5, 22, 23, 23, 24, 25, 26, 24, 27, 28, 29, 30, 25, 26, 6, 27, 7, 31, 28, 29, 8, 32, 30, 9]

cp's OEIS Frontend

A340313 The n-th squarefree number is the a(n)-th squarefree number having its number of primes.

Table of values

List of values

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

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

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