A099310 - cp's OEIS frontend

A099310 Arithmetic derivative of Euler's totient function phi(n).

n	a(n)
1	0
2	0
3	1
4	1
5	4
6	1
7	5
8	4
9	5
10	4
11	7
12	4
13	16
14	5
15	12
16	12
17	32
18	5
19	21
20	12
21	16
22	7
23	13
24	12
25	24
26	16
27	21
28	16
29	32
30	12
31	31
32	32
33	24
34	32
35	44
36	16
37	60
38	21
39	44
40	32
41	68
42	16
43	41
44	24
45	44
46	13
47	25
48	32
49	41
50	24
51	80
52	44
53	56
54	21
55	68
56	44
57	60
58	32
59	31
60	32
61	92
62	31
63	60
64	80
65	112
66	24
67	61
68	80
69	48
70	44
71	59
72	44
73	156
74	60

[0, 0, 1, 1, 4, 1, 5, 4, 5, 4, 7, 4, 16, 5, 12, 12, 32, 5, 21, 12, 16, 7, 13, 12, 24, 16, 21, 16, 32, 12, 31, 32, 24, 32, 44, 16, 60, 21, 44, 32, 68, 16, 41, 24, 44, 13, 25, 32, 41, 24, 80, 44, 56, 21, 68, 44, 60, 32, 31, 32, 92, 31, 60, 80, 112, 24, 61, 80, 48, 44, 59, 44, 156, 60]

cp's OEIS Frontend

A099310 Arithmetic derivative of Euler's totient function phi(n).

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	1
5	4
6	1
7	5
8	4
9	5
10	4
11	7
12	4
13	16
14	5
15	12
16	12
17	32
18	5
19	21
20	12
21	16
22	7
23	13
24	12
25	24
26	16
27	21
28	16
29	32
30	12
31	31
32	32
33	24
34	32
35	44
36	16
37	60
38	21
39	44
40	32
41	68
42	16
43	41
44	24
45	44
46	13
47	25
48	32
49	41
50	24
51	80
52	44
53	56
54	21
55	68
56	44
57	60
58	32
59	31
60	32
61	92
62	31
63	60
64	80
65	112
66	24
67	61
68	80
69	48
70	44
71	59
72	44
73	156
74	60

n	a(n)
1	0
2	0
3	1
4	1
5	4
6	1
7	5
8	4
9	5
10	4
11	7
12	4
13	16
14	5
15	12
16	12
17	32
18	5
19	21
20	12
21	16
22	7
23	13
24	12
25	24
26	16
27	21
28	16
29	32
30	12
31	31
32	32
33	24
34	32
35	44
36	16
37	60
38	21
39	44
40	32
41	68
42	16
43	41
44	24
45	44
46	13
47	25
48	32
49	41
50	24
51	80
52	44
53	56
54	21
55	68
56	44
57	60
58	32
59	31
60	32
61	92
62	31
63	60
64	80
65	112
66	24
67	61
68	80
69	48
70	44
71	59
72	44
73	156
74	60

n	a(n)
1	0
2	0
3	1
4	1
5	4
6	1
7	5
8	4
9	5
10	4
11	7
12	4
13	16
14	5
15	12
16	12
17	32
18	5
19	21
20	12
21	16
22	7
23	13
24	12
25	24
26	16
27	21
28	16
29	32
30	12
31	31
32	32
33	24
34	32
35	44
36	16
37	60
38	21
39	44
40	32
41	68
42	16
43	41
44	24
45	44
46	13
47	25
48	32
49	41
50	24
51	80
52	44
53	56
54	21
55	68
56	44
57	60
58	32
59	31
60	32
61	92
62	31
63	60
64	80
65	112
66	24
67	61
68	80
69	48
70	44
71	59
72	44
73	156
74	60