A353644 - cp's OEIS frontend

A353644 a(n) = phi(n) / gcd(phi(n), phi(sigma(n))).

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

[1, 1, 1, 1, 2, 1, 3, 1, 1, 2, 5, 1, 2, 3, 1, 4, 8, 1, 9, 2, 3, 5, 11, 1, 2, 1, 9, 1, 7, 1, 15, 4, 5, 8, 3, 1, 2, 9, 1, 2, 10, 3, 21, 5, 1, 11, 23, 4, 7, 1, 4, 4, 26, 9, 5, 3, 9, 7, 29, 1, 2, 15, 3, 16, 2, 5, 33, 8, 11, 1, 35, 1, 2, 1, 2, 3, 15, 1, 39, 8, 27, 10, 41, 1, 16, 21, 7, 5, 11, 1, 3, 11, 15, 23, 9, 4, 16, 7]

cp's OEIS Frontend

A353644 a(n) = phi(n) / gcd(phi(n), phi(sigma(n))).

Table of values

List of values

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

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

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