A353761 - cp's OEIS frontend

A353761 a(n) = gcd(A353749(n), A353750(n)), where A353749(n) = phi(n)*A064989(n), and A353750(n) = A353749(sigma(n)).

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	4
7	2
8	4
9	12
10	12
11	2
12	4
13	6
14	2
15	16
16	2
17	8
18	24
19	6
20	24
21	8
22	2
23	2
24	16
25	30
26	12
27	48
28	60
29	4
30	48
31	2
32	16
33	8
34	16
35	8
36	24
37	18
38	6
39	24
40	48
41	40
42	8
43	14
44	20
45	48
46	2
47	2
48	4
49	6
50	60
51	32
52	6
53	4
54	48
55	24
56	24
57	24
58	4
59	2
60	96
61	30
62	2
63	48
64	2
65	48
66	8
67	2
68	16
69	8
70	24
71	2
72	96
73	36
74	36
75	60
76	36
77	4
78	48
79	6
80	24
81	2
82	40
83	2
84	240
85	96
86	14
87	16
88	8
89	8
90	288

[1, 1, 2, 2, 4, 4, 2, 4, 12, 12, 2, 4, 6, 2, 16, 2, 8, 24, 6, 24, 8, 2, 2, 16, 30, 12, 48, 60, 4, 48, 2, 16, 8, 16, 8, 24, 18, 6, 24, 48, 40, 8, 14, 20, 48, 2, 2, 4, 6, 60, 32, 6, 4, 48, 24, 24, 24, 4, 2, 96, 30, 2, 48, 2, 48, 8, 2, 16, 8, 24, 2, 96, 36, 36, 60, 36, 4, 48, 6, 24, 2, 40, 2, 240, 96, 14, 16, 8, 8, 288]

cp's OEIS Frontend

A353761 a(n) = gcd(A353749(n), A353750(n)), where A353749(n) = phi(n)*A064989(n), and A353750(n) = A353749(sigma(n)).

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	4
7	2
8	4
9	12
10	12
11	2
12	4
13	6
14	2
15	16
16	2
17	8
18	24
19	6
20	24
21	8
22	2
23	2
24	16
25	30
26	12
27	48
28	60
29	4
30	48
31	2
32	16
33	8
34	16
35	8
36	24
37	18
38	6
39	24
40	48
41	40
42	8
43	14
44	20
45	48
46	2
47	2
48	4
49	6
50	60
51	32
52	6
53	4
54	48
55	24
56	24
57	24
58	4
59	2
60	96
61	30
62	2
63	48
64	2
65	48
66	8
67	2
68	16
69	8
70	24
71	2
72	96
73	36
74	36
75	60
76	36
77	4
78	48
79	6
80	24
81	2
82	40
83	2
84	240
85	96
86	14
87	16
88	8
89	8
90	288

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	4
7	2
8	4
9	12
10	12
11	2
12	4
13	6
14	2
15	16
16	2
17	8
18	24
19	6
20	24
21	8
22	2
23	2
24	16
25	30
26	12
27	48
28	60
29	4
30	48
31	2
32	16
33	8
34	16
35	8
36	24
37	18
38	6
39	24
40	48
41	40
42	8
43	14
44	20
45	48
46	2
47	2
48	4
49	6
50	60
51	32
52	6
53	4
54	48
55	24
56	24
57	24
58	4
59	2
60	96
61	30
62	2
63	48
64	2
65	48
66	8
67	2
68	16
69	8
70	24
71	2
72	96
73	36
74	36
75	60
76	36
77	4
78	48
79	6
80	24
81	2
82	40
83	2
84	240
85	96
86	14
87	16
88	8
89	8
90	288

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	4
7	2
8	4
9	12
10	12
11	2
12	4
13	6
14	2
15	16
16	2
17	8
18	24
19	6
20	24
21	8
22	2
23	2
24	16
25	30
26	12
27	48
28	60
29	4
30	48
31	2
32	16
33	8
34	16
35	8
36	24
37	18
38	6
39	24
40	48
41	40
42	8
43	14
44	20
45	48
46	2
47	2
48	4
49	6
50	60
51	32
52	6
53	4
54	48
55	24
56	24
57	24
58	4
59	2
60	96
61	30
62	2
63	48
64	2
65	48
66	8
67	2
68	16
69	8
70	24
71	2
72	96
73	36
74	36
75	60
76	36
77	4
78	48
79	6
80	24
81	2
82	40
83	2
84	240
85	96
86	14
87	16
88	8
89	8
90	288