A231117 - cp's OEIS frontend

A231117 Number of positive integers <= n and relatively prime to n which are squarefree if and only if n is squarefree.

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

[1, 1, 2, 0, 3, 2, 5, 0, 2, 3, 7, 0, 8, 5, 6, 1, 11, 0, 12, 1, 8, 9, 15, 0, 7, 10, 5, 3, 17, 8, 19, 3, 13, 13, 15, 1, 23, 15, 17, 2, 26, 11, 28, 3, 6, 18, 30, 1, 16, 3, 21, 5, 32, 2, 25, 4, 23, 23, 36, 1, 37, 25, 10, 6, 30, 18, 41, 6, 29, 22, 44, 2, 45, 30, 11, 7, 36, 22, 49, 4, 17, 32]

cp's OEIS Frontend

A231117 Number of positive integers <= n and relatively prime to n which are squarefree if and only if n is squarefree.

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

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

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