A077641 - cp's OEIS frontend

A077641 Number of squarefree integers in closed interval [n, 2n-1], i.e., among n consecutive numbers beginning with n.

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

[1, 2, 2, 3, 3, 4, 4, 5, 6, 7, 7, 8, 8, 8, 8, 9, 10, 11, 12, 13, 14, 15, 14, 15, 15, 16, 16, 17, 18, 19, 19, 19, 20, 21, 21, 22, 23, 23, 23, 24, 24, 25, 25, 26, 27, 28, 28, 29, 30, 30, 31, 32, 33, 34, 35, 36, 37, 38, 37, 38, 38, 39, 38, 39, 40, 41, 41, 41, 42, 43, 43, 44, 45, 45]

cp's OEIS Frontend

A077641 Number of squarefree integers in closed interval [n, 2n-1], i.e., among n consecutive numbers beginning with n.

Table of values

List of values

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

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

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