A091813 - cp's OEIS frontend

A091813 Number of positive squarefree integers k<=n satisfying gcd_(k,n)=1, where gcd_(k,n) is the greatest divisor of k that is also a unitary divisor of n.

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

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

cp's OEIS Frontend

A091813 Number of positive squarefree integers k<=n satisfying gcd_(k,n)=1, where gcd_(k,n) is the greatest divisor of k that is also a unitary divisor of n.

Table of values

List of values

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

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

cp's OEIS Frontend

A091813 Number of positive squarefree integers k<=n satisfying gcd_*(k,n)=1, where gcd_*(k,n) is the greatest divisor of k that is also a unitary divisor of n.

Table of values

List of values

A091813 Number of positive squarefree integers k<=n satisfying gcd_(k,n)=1, where gcd_(k,n) is the greatest divisor of k that is also a unitary divisor of n.

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