A342413 - cp's OEIS frontend

A342413 a(n) = gcd(phi(n), A003415(n)), where A003415(n) is the arithmetic derivative of n, and phi is Euler totient function.

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

[1, 1, 1, 2, 1, 1, 1, 4, 6, 1, 1, 4, 1, 3, 8, 8, 1, 3, 1, 8, 2, 1, 1, 4, 10, 3, 9, 4, 1, 1, 1, 16, 2, 1, 12, 12, 1, 3, 8, 4, 1, 1, 1, 4, 3, 1, 1, 16, 14, 5, 4, 8, 1, 9, 8, 4, 2, 1, 1, 4, 1, 3, 3, 32, 6, 1, 1, 8, 2, 1, 1, 12, 1, 3, 5, 4, 6, 1, 1, 16, 54, 1, 1, 4, 2, 3, 8, 20, 1, 3, 4, 4, 2, 1, 24, 16, 1, 7, 15, 20]

cp's OEIS Frontend

A342413 a(n) = gcd(phi(n), A003415(n)), where A003415(n) is the arithmetic derivative of n, and phi is Euler totient function.

Table of values

List of values

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

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

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