A328236 - cp's OEIS frontend

A328236 The least m > 1 such that the arithmetic derivative of m*n is a multiple of the arithmetic derivative of n.

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

[2, 2, 2, 2, 6, 2, 8, 4, 10, 2, 4, 2, 14, 12, 4, 2, 10, 2, 8, 21, 22, 2, 24, 4, 26, 2, 12, 2, 30, 2, 6, 33, 34, 8, 6, 2, 18, 12, 40, 2, 42, 2, 8, 22, 46, 2, 10, 4, 14, 32, 33, 2, 8, 12, 56, 24, 30, 2, 56, 2, 62, 40, 8, 65, 66, 2, 65, 69, 70, 2, 22, 2, 45, 24, 32, 65, 78, 2, 24, 4, 82, 2, 30, 24, 50, 16, 88, 2, 42, 32, 20, 40]

cp's OEIS Frontend

A328236 The least m > 1 such that the arithmetic derivative of m*n is a multiple of the arithmetic derivative of n.

Table of values

List of values

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

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

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