A370690 - cp's OEIS frontend

A370690 Denominator of sigma(phi(n))/phi(sigma(n)), where sigma is the sum of the divisors function and phi is the Euler totient function.

n	a(n)
1	1
2	2
3	2
4	2
5	2
6	4
7	1
8	8
9	1
10	6
11	2
12	12
13	3
14	2
15	8
16	2
17	6
18	2
19	8
20	4
21	4
22	2
23	2
24	16
25	5
26	3
27	16
28	6
29	1
30	8
31	2
32	36
33	8
34	18
35	4
36	18
37	18
38	16
39	2
40	24
41	2
42	8
43	5
44	4
45	2
46	2
47	2
48	60
49	3
50	10
51	8
52	7
53	9
54	32
55	4
56	8
57	32
58	3
59	8
60	48
61	5
62	4
63	48
64	2
65	6
66	8
67	2
68	4
69	8
70	4
71	1
72	8
73	12
74	36
75	2
76	48
77	4
78	4
79	4
80	20
81	11

[1, 2, 2, 2, 2, 4, 1, 8, 1, 6, 2, 12, 3, 2, 8, 2, 6, 2, 8, 4, 4, 2, 2, 16, 5, 3, 16, 6, 1, 8, 2, 36, 8, 18, 4, 18, 18, 16, 2, 24, 2, 8, 5, 4, 2, 2, 2, 60, 3, 10, 8, 7, 9, 32, 4, 8, 32, 3, 8, 48, 5, 4, 48, 2, 6, 8, 2, 4, 8, 4, 1, 8, 12, 36, 2, 48, 4, 4, 4, 20, 11]

cp's OEIS Frontend

A370690 Denominator of sigma(phi(n))/phi(sigma(n)), where sigma is the sum of the divisors function and phi is the Euler totient function.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	2
5	2
6	4
7	1
8	8
9	1
10	6
11	2
12	12
13	3
14	2
15	8
16	2
17	6
18	2
19	8
20	4
21	4
22	2
23	2
24	16
25	5
26	3
27	16
28	6
29	1
30	8
31	2
32	36
33	8
34	18
35	4
36	18
37	18
38	16
39	2
40	24
41	2
42	8
43	5
44	4
45	2
46	2
47	2
48	60
49	3
50	10
51	8
52	7
53	9
54	32
55	4
56	8
57	32
58	3
59	8
60	48
61	5
62	4
63	48
64	2
65	6
66	8
67	2
68	4
69	8
70	4
71	1
72	8
73	12
74	36
75	2
76	48
77	4
78	4
79	4
80	20
81	11

n	a(n)
1	1
2	2
3	2
4	2
5	2
6	4
7	1
8	8
9	1
10	6
11	2
12	12
13	3
14	2
15	8
16	2
17	6
18	2
19	8
20	4
21	4
22	2
23	2
24	16
25	5
26	3
27	16
28	6
29	1
30	8
31	2
32	36
33	8
34	18
35	4
36	18
37	18
38	16
39	2
40	24
41	2
42	8
43	5
44	4
45	2
46	2
47	2
48	60
49	3
50	10
51	8
52	7
53	9
54	32
55	4
56	8
57	32
58	3
59	8
60	48
61	5
62	4
63	48
64	2
65	6
66	8
67	2
68	4
69	8
70	4
71	1
72	8
73	12
74	36
75	2
76	48
77	4
78	4
79	4
80	20
81	11

n	a(n)
1	1
2	2
3	2
4	2
5	2
6	4
7	1
8	8
9	1
10	6
11	2
12	12
13	3
14	2
15	8
16	2
17	6
18	2
19	8
20	4
21	4
22	2
23	2
24	16
25	5
26	3
27	16
28	6
29	1
30	8
31	2
32	36
33	8
34	18
35	4
36	18
37	18
38	16
39	2
40	24
41	2
42	8
43	5
44	4
45	2
46	2
47	2
48	60
49	3
50	10
51	8
52	7
53	9
54	32
55	4
56	8
57	32
58	3
59	8
60	48
61	5
62	4
63	48
64	2
65	6
66	8
67	2
68	4
69	8
70	4
71	1
72	8
73	12
74	36
75	2
76	48
77	4
78	4
79	4
80	20
81	11