A064380 - cp's OEIS frontend

A064380 Number of numbers less than n that are infinitarily relatively prime to n; the infinitary Euler phi function.

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

[1, 2, 3, 4, 3, 6, 4, 8, 5, 10, 7, 12, 8, 9, 15, 16, 11, 18, 13, 14, 14, 22, 10, 24, 16, 18, 19, 28, 13, 30, 20, 22, 21, 25, 26, 36, 24, 27, 18, 40, 17, 42, 32, 33, 29, 46, 34, 48, 32, 36, 39, 52, 24, 42, 27, 40, 37, 58, 30, 60, 40, 49, 48, 50, 30, 66, 51, 49, 35, 70, 34, 72, 48]

cp's OEIS Frontend

A064380 Number of numbers less than n that are infinitarily relatively prime to n; the infinitary Euler phi function.

Table of values

List of values

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

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

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