A175732 - cp's OEIS frontend

A175732 a(n) = gcd(phi(n), psi(n)).

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

[1, 1, 2, 2, 2, 2, 2, 4, 6, 2, 2, 4, 2, 6, 8, 8, 2, 6, 2, 4, 4, 2, 2, 8, 10, 6, 18, 12, 2, 8, 2, 16, 4, 2, 24, 12, 2, 6, 8, 8, 2, 12, 2, 4, 24, 2, 2, 16, 14, 10, 8, 12, 2, 18, 8, 24, 4, 2, 2, 16, 2, 6, 12, 32, 12, 4, 2, 4, 4, 24, 2, 24, 2, 6, 40, 12, 12, 24, 2, 16, 54, 2, 2, 24, 4, 6, 8, 8, 2, 24, 8]

cp's OEIS Frontend

A175732 a(n) = gcd(phi(n), psi(n)).

Table of values

List of values

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

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

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