A066683 - cp's OEIS frontend

A066683 Number of badly sieved numbers <= n.

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

[0, 1, 2, 2, 3, 3, 4, 5, 5, 5, 6, 7, 8, 8, 8, 8, 9, 10, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 14, 15, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 21, 22, 22, 22, 23, 23, 23, 23, 23, 23, 24, 24, 25, 25, 26, 26, 26, 26]

cp's OEIS Frontend

A066683 Number of badly sieved numbers <= n.

Table of values

List of values

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

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

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