A285879 - cp's OEIS frontend

A285879 Number of odd squarefree numbers <= n.

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

[1, 1, 2, 2, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 11, 11, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 26, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 31, 31, 32, 32, 33, 33, 33, 33, 34, 34, 35]

cp's OEIS Frontend

A285879 Number of odd squarefree numbers <= n.

Table of values

List of values

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

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

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