A062401 - cp's OEIS frontend

A062401 a(n) = phi(sigma(n)).

n	a(n)
1	1
2	2
3	2
4	6
5	2
6	4
7	4
8	8
9	12
10	6
11	4
12	12
13	6
14	8
15	8
16	30
17	6
18	24
19	8
20	12
21	16
22	12
23	8
24	16
25	30
26	12
27	16
28	24
29	8
30	24
31	16
32	36
33	16
34	18
35	16
36	72
37	18
38	16
39	24
40	24
41	12
42	32
43	20
44	24
45	24
46	24
47	16
48	60
49	36
50	60
51	24
52	42
53	18
54	32
55	24
56	32
57	32
58	24
59	16
60	48
61	30
62	32
63	48
64	126
65	24
66	48
67	32
68	36
69	32
70	48
71	24
72	96
73	36
74	36
75	60

[1, 2, 2, 6, 2, 4, 4, 8, 12, 6, 4, 12, 6, 8, 8, 30, 6, 24, 8, 12, 16, 12, 8, 16, 30, 12, 16, 24, 8, 24, 16, 36, 16, 18, 16, 72, 18, 16, 24, 24, 12, 32, 20, 24, 24, 24, 16, 60, 36, 60, 24, 42, 18, 32, 24, 32, 32, 24, 16, 48, 30, 32, 48, 126, 24, 48, 32, 36, 32, 48, 24, 96, 36, 36, 60]

cp's OEIS Frontend

A062401 a(n) = phi(sigma(n)).

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	6
5	2
6	4
7	4
8	8
9	12
10	6
11	4
12	12
13	6
14	8
15	8
16	30
17	6
18	24
19	8
20	12
21	16
22	12
23	8
24	16
25	30
26	12
27	16
28	24
29	8
30	24
31	16
32	36
33	16
34	18
35	16
36	72
37	18
38	16
39	24
40	24
41	12
42	32
43	20
44	24
45	24
46	24
47	16
48	60
49	36
50	60
51	24
52	42
53	18
54	32
55	24
56	32
57	32
58	24
59	16
60	48
61	30
62	32
63	48
64	126
65	24
66	48
67	32
68	36
69	32
70	48
71	24
72	96
73	36
74	36
75	60

n	a(n)
1	1
2	2
3	2
4	6
5	2
6	4
7	4
8	8
9	12
10	6
11	4
12	12
13	6
14	8
15	8
16	30
17	6
18	24
19	8
20	12
21	16
22	12
23	8
24	16
25	30
26	12
27	16
28	24
29	8
30	24
31	16
32	36
33	16
34	18
35	16
36	72
37	18
38	16
39	24
40	24
41	12
42	32
43	20
44	24
45	24
46	24
47	16
48	60
49	36
50	60
51	24
52	42
53	18
54	32
55	24
56	32
57	32
58	24
59	16
60	48
61	30
62	32
63	48
64	126
65	24
66	48
67	32
68	36
69	32
70	48
71	24
72	96
73	36
74	36
75	60

n	a(n)
1	1
2	2
3	2
4	6
5	2
6	4
7	4
8	8
9	12
10	6
11	4
12	12
13	6
14	8
15	8
16	30
17	6
18	24
19	8
20	12
21	16
22	12
23	8
24	16
25	30
26	12
27	16
28	24
29	8
30	24
31	16
32	36
33	16
34	18
35	16
36	72
37	18
38	16
39	24
40	24
41	12
42	32
43	20
44	24
45	24
46	24
47	16
48	60
49	36
50	60
51	24
52	42
53	18
54	32
55	24
56	32
57	32
58	24
59	16
60	48
61	30
62	32
63	48
64	126
65	24
66	48
67	32
68	36
69	32
70	48
71	24
72	96
73	36
74	36
75	60