A319357 - cp's OEIS frontend

A319357 Filter sequence combining A003415(d) from all proper divisors d of n, where A003415(d) = arithmetic derivative of d.

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	4
7	2
8	5
9	3
10	4
11	2
12	6
13	2
14	4
15	4
16	7
17	2
18	8
19	2
20	9
21	4
22	4
23	2
24	10
25	3
26	4
27	11
28	12
29	2
30	13
31	2
32	14
33	4
34	4
35	4
36	15
37	2
38	4
39	4
40	16
41	2
42	17
43	2
44	18
45	19
46	4
47	2
48	20
49	3
50	21
51	4
52	22
53	2
54	23
55	4
56	24
57	4
58	4
59	2
60	25
61	2
62	4
63	26
64	27
65	4
66	28
67	2
68	29
69	4
70	30
71	2
72	31
73	2
74	4
75	32
76	33
77	4
78	34
79	2
80	35
81	36
82	4
83	2
84	37
85	4
86	4
87	4
88	38
89	2
90	39
91	4
92	40
93	4
94	4
95	4
96	41
97	2
98	42
99	43
100	44
101	2
102	45
103	2
104	46
105	47

[1, 2, 2, 3, 2, 4, 2, 5, 3, 4, 2, 6, 2, 4, 4, 7, 2, 8, 2, 9, 4, 4, 2, 10, 3, 4, 11, 12, 2, 13, 2, 14, 4, 4, 4, 15, 2, 4, 4, 16, 2, 17, 2, 18, 19, 4, 2, 20, 3, 21, 4, 22, 2, 23, 4, 24, 4, 4, 2, 25, 2, 4, 26, 27, 4, 28, 2, 29, 4, 30, 2, 31, 2, 4, 32, 33, 4, 34, 2, 35, 36, 4, 2, 37, 4, 4, 4, 38, 2, 39, 4, 40, 4, 4, 4, 41, 2, 42, 43, 44, 2, 45, 2, 46, 47]

cp's OEIS Frontend

A319357 Filter sequence combining A003415(d) from all proper divisors d of n, where A003415(d) = arithmetic derivative of d.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	4
7	2
8	5
9	3
10	4
11	2
12	6
13	2
14	4
15	4
16	7
17	2
18	8
19	2
20	9
21	4
22	4
23	2
24	10
25	3
26	4
27	11
28	12
29	2
30	13
31	2
32	14
33	4
34	4
35	4
36	15
37	2
38	4
39	4
40	16
41	2
42	17
43	2
44	18
45	19
46	4
47	2
48	20
49	3
50	21
51	4
52	22
53	2
54	23
55	4
56	24
57	4
58	4
59	2
60	25
61	2
62	4
63	26
64	27
65	4
66	28
67	2
68	29
69	4
70	30
71	2
72	31
73	2
74	4
75	32
76	33
77	4
78	34
79	2
80	35
81	36
82	4
83	2
84	37
85	4
86	4
87	4
88	38
89	2
90	39
91	4
92	40
93	4
94	4
95	4
96	41
97	2
98	42
99	43
100	44
101	2
102	45
103	2
104	46
105	47

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	4
7	2
8	5
9	3
10	4
11	2
12	6
13	2
14	4
15	4
16	7
17	2
18	8
19	2
20	9
21	4
22	4
23	2
24	10
25	3
26	4
27	11
28	12
29	2
30	13
31	2
32	14
33	4
34	4
35	4
36	15
37	2
38	4
39	4
40	16
41	2
42	17
43	2
44	18
45	19
46	4
47	2
48	20
49	3
50	21
51	4
52	22
53	2
54	23
55	4
56	24
57	4
58	4
59	2
60	25
61	2
62	4
63	26
64	27
65	4
66	28
67	2
68	29
69	4
70	30
71	2
72	31
73	2
74	4
75	32
76	33
77	4
78	34
79	2
80	35
81	36
82	4
83	2
84	37
85	4
86	4
87	4
88	38
89	2
90	39
91	4
92	40
93	4
94	4
95	4
96	41
97	2
98	42
99	43
100	44
101	2
102	45
103	2
104	46
105	47

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	4
7	2
8	5
9	3
10	4
11	2
12	6
13	2
14	4
15	4
16	7
17	2
18	8
19	2
20	9
21	4
22	4
23	2
24	10
25	3
26	4
27	11
28	12
29	2
30	13
31	2
32	14
33	4
34	4
35	4
36	15
37	2
38	4
39	4
40	16
41	2
42	17
43	2
44	18
45	19
46	4
47	2
48	20
49	3
50	21
51	4
52	22
53	2
54	23
55	4
56	24
57	4
58	4
59	2
60	25
61	2
62	4
63	26
64	27
65	4
66	28
67	2
68	29
69	4
70	30
71	2
72	31
73	2
74	4
75	32
76	33
77	4
78	34
79	2
80	35
81	36
82	4
83	2
84	37
85	4
86	4
87	4
88	38
89	2
90	39
91	4
92	40
93	4
94	4
95	4
96	41
97	2
98	42
99	43
100	44
101	2
102	45
103	2
104	46
105	47