A169646 - cp's OEIS frontend

A169646 Number of squarefree numbers of form k*n, 1 <= k <= n.

n	a(n)
1	1
2	1
3	2
4	0
5	3
6	2
7	5
8	0
9	0
10	3
11	7
12	0
13	8
14	5
15	6
16	0
17	11
18	0
19	12
20	0
21	8
22	9
23	15
24	0
25	0
26	10
27	0
28	0
29	17
30	8
31	19
32	0
33	13
34	13
35	15
36	0
37	23
38	15
39	17
40	0
41	26
42	11
43	28
44	0
45	0
46	18
47	30
48	0
49	0
50	0
51	21
52	0
53	32
54	0
55	25
56	0
57	23
58	23
59	36
60	0
61	37
62	25
63	0
64	0
65	30
66	18
67	41
68	0
69	29
70	22
71	44
72	0
73	45
74	30
75	0
76	0
77	36
78	22
79	49
80	0
81	0
82	32
83	51
84	0
85	41
86	34

[1, 1, 2, 0, 3, 2, 5, 0, 0, 3, 7, 0, 8, 5, 6, 0, 11, 0, 12, 0, 8, 9, 15, 0, 0, 10, 0, 0, 17, 8, 19, 0, 13, 13, 15, 0, 23, 15, 17, 0, 26, 11, 28, 0, 0, 18, 30, 0, 0, 0, 21, 0, 32, 0, 25, 0, 23, 23, 36, 0, 37, 25, 0, 0, 30, 18, 41, 0, 29, 22, 44, 0, 45, 30, 0, 0, 36, 22, 49, 0, 0, 32, 51, 0, 41, 34]

cp's OEIS Frontend

A169646 Number of squarefree numbers of form k*n, 1 <= k <= n.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	0
5	3
6	2
7	5
8	0
9	0
10	3
11	7
12	0
13	8
14	5
15	6
16	0
17	11
18	0
19	12
20	0
21	8
22	9
23	15
24	0
25	0
26	10
27	0
28	0
29	17
30	8
31	19
32	0
33	13
34	13
35	15
36	0
37	23
38	15
39	17
40	0
41	26
42	11
43	28
44	0
45	0
46	18
47	30
48	0
49	0
50	0
51	21
52	0
53	32
54	0
55	25
56	0
57	23
58	23
59	36
60	0
61	37
62	25
63	0
64	0
65	30
66	18
67	41
68	0
69	29
70	22
71	44
72	0
73	45
74	30
75	0
76	0
77	36
78	22
79	49
80	0
81	0
82	32
83	51
84	0
85	41
86	34

n	a(n)
1	1
2	1
3	2
4	0
5	3
6	2
7	5
8	0
9	0
10	3
11	7
12	0
13	8
14	5
15	6
16	0
17	11
18	0
19	12
20	0
21	8
22	9
23	15
24	0
25	0
26	10
27	0
28	0
29	17
30	8
31	19
32	0
33	13
34	13
35	15
36	0
37	23
38	15
39	17
40	0
41	26
42	11
43	28
44	0
45	0
46	18
47	30
48	0
49	0
50	0
51	21
52	0
53	32
54	0
55	25
56	0
57	23
58	23
59	36
60	0
61	37
62	25
63	0
64	0
65	30
66	18
67	41
68	0
69	29
70	22
71	44
72	0
73	45
74	30
75	0
76	0
77	36
78	22
79	49
80	0
81	0
82	32
83	51
84	0
85	41
86	34

n	a(n)
1	1
2	1
3	2
4	0
5	3
6	2
7	5
8	0
9	0
10	3
11	7
12	0
13	8
14	5
15	6
16	0
17	11
18	0
19	12
20	0
21	8
22	9
23	15
24	0
25	0
26	10
27	0
28	0
29	17
30	8
31	19
32	0
33	13
34	13
35	15
36	0
37	23
38	15
39	17
40	0
41	26
42	11
43	28
44	0
45	0
46	18
47	30
48	0
49	0
50	0
51	21
52	0
53	32
54	0
55	25
56	0
57	23
58	23
59	36
60	0
61	37
62	25
63	0
64	0
65	30
66	18
67	41
68	0
69	29
70	22
71	44
72	0
73	45
74	30
75	0
76	0
77	36
78	22
79	49
80	0
81	0
82	32
83	51
84	0
85	41
86	34