A241006 - cp's OEIS frontend

A241006 Number of positive numbers that are coprime to all anti-divisors of n.

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

[1, 1, 2, 1, 3, 1, 4, 3, 2, 2, 5, 3, 5, 4, 9, 2, 4, 5, 6, 6, 6, 6, 10, 5, 8, 6, 5, 8, 8, 9, 12, 7, 10, 7, 12, 9, 8, 9, 13, 13, 9, 9, 14, 10, 11, 10, 18, 13, 13, 16, 12, 12, 18, 13, 18, 13, 13, 14, 12, 17, 16, 15, 41, 15, 16, 14, 18, 22, 15, 18, 16, 16, 22, 20, 24, 15, 19, 25, 21]

cp's OEIS Frontend

A241006 Number of positive numbers that are coprime to all anti-divisors of n.

Table of values

List of values

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

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

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