A353646 - cp's OEIS frontend

A353646 a(n) = phi(sigma(n)) / gcd(phi(n), phi(sigma(n))).

n	a(n)
1	1
2	2
3	1
4	3
5	1
6	2
7	2
8	2
9	2
10	3
11	2
12	3
13	1
14	4
15	1
16	15
17	3
18	4
19	4
20	3
21	4
22	6
23	4
24	2
25	3
26	1
27	8
28	2
29	2
30	3
31	8
32	9
33	4
34	9
35	2
36	6
37	1
38	8
39	1
40	3
41	3
42	8
43	10
44	6
45	1
46	12
47	8
48	15
49	6
50	3
51	3
52	7
53	9
54	16
55	3
56	4
57	8
58	6
59	8
60	3
61	1
62	16
63	4
64	63
65	1
66	12
67	16
68	9
69	8
70	2
71	12
72	4
73	1
74	1
75	3
76	4
77	8
78	2
79	16
80	15
81	55
82	9
83	12
84	4
85	9
86	20
87	4
88	6
89	3
90	3
91	2
92	12
93	16
94	24
95	4
96	9
97	7
98	18
99	4
100	9

[1, 2, 1, 3, 1, 2, 2, 2, 2, 3, 2, 3, 1, 4, 1, 15, 3, 4, 4, 3, 4, 6, 4, 2, 3, 1, 8, 2, 2, 3, 8, 9, 4, 9, 2, 6, 1, 8, 1, 3, 3, 8, 10, 6, 1, 12, 8, 15, 6, 3, 3, 7, 9, 16, 3, 4, 8, 6, 8, 3, 1, 16, 4, 63, 1, 12, 16, 9, 8, 2, 12, 4, 1, 1, 3, 4, 8, 2, 16, 15, 55, 9, 12, 4, 9, 20, 4, 6, 3, 3, 2, 12, 16, 24, 4, 9, 7, 18, 4, 9]

cp's OEIS Frontend

A353646 a(n) = phi(sigma(n)) / gcd(phi(n), phi(sigma(n))).

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	3
5	1
6	2
7	2
8	2
9	2
10	3
11	2
12	3
13	1
14	4
15	1
16	15
17	3
18	4
19	4
20	3
21	4
22	6
23	4
24	2
25	3
26	1
27	8
28	2
29	2
30	3
31	8
32	9
33	4
34	9
35	2
36	6
37	1
38	8
39	1
40	3
41	3
42	8
43	10
44	6
45	1
46	12
47	8
48	15
49	6
50	3
51	3
52	7
53	9
54	16
55	3
56	4
57	8
58	6
59	8
60	3
61	1
62	16
63	4
64	63
65	1
66	12
67	16
68	9
69	8
70	2
71	12
72	4
73	1
74	1
75	3
76	4
77	8
78	2
79	16
80	15
81	55
82	9
83	12
84	4
85	9
86	20
87	4
88	6
89	3
90	3
91	2
92	12
93	16
94	24
95	4
96	9
97	7
98	18
99	4
100	9

n	a(n)
1	1
2	2
3	1
4	3
5	1
6	2
7	2
8	2
9	2
10	3
11	2
12	3
13	1
14	4
15	1
16	15
17	3
18	4
19	4
20	3
21	4
22	6
23	4
24	2
25	3
26	1
27	8
28	2
29	2
30	3
31	8
32	9
33	4
34	9
35	2
36	6
37	1
38	8
39	1
40	3
41	3
42	8
43	10
44	6
45	1
46	12
47	8
48	15
49	6
50	3
51	3
52	7
53	9
54	16
55	3
56	4
57	8
58	6
59	8
60	3
61	1
62	16
63	4
64	63
65	1
66	12
67	16
68	9
69	8
70	2
71	12
72	4
73	1
74	1
75	3
76	4
77	8
78	2
79	16
80	15
81	55
82	9
83	12
84	4
85	9
86	20
87	4
88	6
89	3
90	3
91	2
92	12
93	16
94	24
95	4
96	9
97	7
98	18
99	4
100	9

n	a(n)
1	1
2	2
3	1
4	3
5	1
6	2
7	2
8	2
9	2
10	3
11	2
12	3
13	1
14	4
15	1
16	15
17	3
18	4
19	4
20	3
21	4
22	6
23	4
24	2
25	3
26	1
27	8
28	2
29	2
30	3
31	8
32	9
33	4
34	9
35	2
36	6
37	1
38	8
39	1
40	3
41	3
42	8
43	10
44	6
45	1
46	12
47	8
48	15
49	6
50	3
51	3
52	7
53	9
54	16
55	3
56	4
57	8
58	6
59	8
60	3
61	1
62	16
63	4
64	63
65	1
66	12
67	16
68	9
69	8
70	2
71	12
72	4
73	1
74	1
75	3
76	4
77	8
78	2
79	16
80	15
81	55
82	9
83	12
84	4
85	9
86	20
87	4
88	6
89	3
90	3
91	2
92	12
93	16
94	24
95	4
96	9
97	7
98	18
99	4
100	9