A186970 - cp's OEIS frontend

A186970 The oex analog of the Euler phi-function for the oex prime power factorization of positive integers.

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

[1, 1, 2, 3, 4, 3, 6, 4, 8, 5, 10, 7, 12, 8, 9, 12, 16, 11, 18, 12, 14, 14, 22, 9, 24, 16, 18, 18, 28, 13, 30, 16, 22, 21, 25, 24, 36, 24, 27, 17, 40, 17, 42, 30, 33, 29, 46, 27, 48, 32, 36, 36, 52, 24, 42, 25, 40, 37, 58, 28, 60, 40, 49, 48, 50, 30, 66, 48, 49, 35, 70, 32, 72, 48, 54, 54, 61, 36]

cp's OEIS Frontend

A186970 The oex analog of the Euler phi-function for the oex prime power factorization of positive integers.

Table of values

List of values

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

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

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