A342458 - cp's OEIS frontend

A342458 a(n) = gcd(A001615(n), A003415(n)), where A001615 is Dedekind psi, and A003415 is the arithmetic derivative of n.

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	12
9	6
10	1
11	1
12	8
13	1
14	3
15	8
16	8
17	1
18	3
19	1
20	12
21	2
22	1
23	1
24	4
25	10
26	3
27	9
28	16
29	1
30	1
31	1
32	16
33	2
34	1
35	12
36	12
37	1
38	3
39	8
40	4
41	1
42	1
43	1
44	24
45	3
46	1
47	1
48	16
49	14
50	45
51	4
52	28
53	1
54	27
55	8
56	4
57	2
58	1
59	1
60	4
61	1
62	3
63	3
64	96
65	6
66	1
67	1
68	36
69	2
70	1
71	1
72	12
73	1
74	3
75	5
76	40
77	6
78	1
79	1
80	16
81	108
82	1
83	1
84	4
85	2
86	3
87	8
88	4
89	1
90	3
91	4
92	48
93	2
94	1
95	24
96	16
97	1
98	7
99	3
100	20

[1, 1, 1, 2, 1, 1, 1, 12, 6, 1, 1, 8, 1, 3, 8, 8, 1, 3, 1, 12, 2, 1, 1, 4, 10, 3, 9, 16, 1, 1, 1, 16, 2, 1, 12, 12, 1, 3, 8, 4, 1, 1, 1, 24, 3, 1, 1, 16, 14, 45, 4, 28, 1, 27, 8, 4, 2, 1, 1, 4, 1, 3, 3, 96, 6, 1, 1, 36, 2, 1, 1, 12, 1, 3, 5, 40, 6, 1, 1, 16, 108, 1, 1, 4, 2, 3, 8, 4, 1, 3, 4, 48, 2, 1, 24, 16, 1, 7, 3, 20]

cp's OEIS Frontend

A342458 a(n) = gcd(A001615(n), A003415(n)), where A001615 is Dedekind psi, and A003415 is the arithmetic derivative of n.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	12
9	6
10	1
11	1
12	8
13	1
14	3
15	8
16	8
17	1
18	3
19	1
20	12
21	2
22	1
23	1
24	4
25	10
26	3
27	9
28	16
29	1
30	1
31	1
32	16
33	2
34	1
35	12
36	12
37	1
38	3
39	8
40	4
41	1
42	1
43	1
44	24
45	3
46	1
47	1
48	16
49	14
50	45
51	4
52	28
53	1
54	27
55	8
56	4
57	2
58	1
59	1
60	4
61	1
62	3
63	3
64	96
65	6
66	1
67	1
68	36
69	2
70	1
71	1
72	12
73	1
74	3
75	5
76	40
77	6
78	1
79	1
80	16
81	108
82	1
83	1
84	4
85	2
86	3
87	8
88	4
89	1
90	3
91	4
92	48
93	2
94	1
95	24
96	16
97	1
98	7
99	3
100	20

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	12
9	6
10	1
11	1
12	8
13	1
14	3
15	8
16	8
17	1
18	3
19	1
20	12
21	2
22	1
23	1
24	4
25	10
26	3
27	9
28	16
29	1
30	1
31	1
32	16
33	2
34	1
35	12
36	12
37	1
38	3
39	8
40	4
41	1
42	1
43	1
44	24
45	3
46	1
47	1
48	16
49	14
50	45
51	4
52	28
53	1
54	27
55	8
56	4
57	2
58	1
59	1
60	4
61	1
62	3
63	3
64	96
65	6
66	1
67	1
68	36
69	2
70	1
71	1
72	12
73	1
74	3
75	5
76	40
77	6
78	1
79	1
80	16
81	108
82	1
83	1
84	4
85	2
86	3
87	8
88	4
89	1
90	3
91	4
92	48
93	2
94	1
95	24
96	16
97	1
98	7
99	3
100	20

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	12
9	6
10	1
11	1
12	8
13	1
14	3
15	8
16	8
17	1
18	3
19	1
20	12
21	2
22	1
23	1
24	4
25	10
26	3
27	9
28	16
29	1
30	1
31	1
32	16
33	2
34	1
35	12
36	12
37	1
38	3
39	8
40	4
41	1
42	1
43	1
44	24
45	3
46	1
47	1
48	16
49	14
50	45
51	4
52	28
53	1
54	27
55	8
56	4
57	2
58	1
59	1
60	4
61	1
62	3
63	3
64	96
65	6
66	1
67	1
68	36
69	2
70	1
71	1
72	12
73	1
74	3
75	5
76	40
77	6
78	1
79	1
80	16
81	108
82	1
83	1
84	4
85	2
86	3
87	8
88	4
89	1
90	3
91	4
92	48
93	2
94	1
95	24
96	16
97	1
98	7
99	3
100	20