A342925 - cp's OEIS frontend

A342925 a(n) = A003415(sigma(n)), where A003415 is the arithmetic derivative, and sigma is the sum of divisors of n.

n	a(n)
1	0
2	1
3	4
4	1
5	5
6	16
7	12
8	8
9	1
10	21
11	16
12	32
13	9
14	44
15	44
16	1
17	21
18	16
19	24
20	41
21	80
22	60
23	44
24	92
25	1
26	41
27	68
28	92
29	31
30	156
31	80
32	51
33	112
34	81
35	112
36	20
37	21
38	92
39	92
40	123
41	41
42	272
43	48
44	124
45	71
46	156
47	112
48	128
49	22
50	34
51	156
52	77
53	81
54	244
55	156
56	244
57	176
58	123
59	92
60	332
61	33
62	272
63	164
64	1
65	124
66	384
67	72
68	165
69	272
70	384
71	156
72	119
73	39
74	101
75	128
76	188

[0, 1, 4, 1, 5, 16, 12, 8, 1, 21, 16, 32, 9, 44, 44, 1, 21, 16, 24, 41, 80, 60, 44, 92, 1, 41, 68, 92, 31, 156, 80, 51, 112, 81, 112, 20, 21, 92, 92, 123, 41, 272, 48, 124, 71, 156, 112, 128, 22, 34, 156, 77, 81, 244, 156, 244, 176, 123, 92, 332, 33, 272, 164, 1, 124, 384, 72, 165, 272, 384, 156, 119, 39, 101, 128, 188]

cp's OEIS Frontend

A342925 a(n) = A003415(sigma(n)), where A003415 is the arithmetic derivative, and sigma is the sum of divisors of n.

Table of values

List of values

n	a(n)
1	0
2	1
3	4
4	1
5	5
6	16
7	12
8	8
9	1
10	21
11	16
12	32
13	9
14	44
15	44
16	1
17	21
18	16
19	24
20	41
21	80
22	60
23	44
24	92
25	1
26	41
27	68
28	92
29	31
30	156
31	80
32	51
33	112
34	81
35	112
36	20
37	21
38	92
39	92
40	123
41	41
42	272
43	48
44	124
45	71
46	156
47	112
48	128
49	22
50	34
51	156
52	77
53	81
54	244
55	156
56	244
57	176
58	123
59	92
60	332
61	33
62	272
63	164
64	1
65	124
66	384
67	72
68	165
69	272
70	384
71	156
72	119
73	39
74	101
75	128
76	188

n	a(n)
1	0
2	1
3	4
4	1
5	5
6	16
7	12
8	8
9	1
10	21
11	16
12	32
13	9
14	44
15	44
16	1
17	21
18	16
19	24
20	41
21	80
22	60
23	44
24	92
25	1
26	41
27	68
28	92
29	31
30	156
31	80
32	51
33	112
34	81
35	112
36	20
37	21
38	92
39	92
40	123
41	41
42	272
43	48
44	124
45	71
46	156
47	112
48	128
49	22
50	34
51	156
52	77
53	81
54	244
55	156
56	244
57	176
58	123
59	92
60	332
61	33
62	272
63	164
64	1
65	124
66	384
67	72
68	165
69	272
70	384
71	156
72	119
73	39
74	101
75	128
76	188

n	a(n)
1	0
2	1
3	4
4	1
5	5
6	16
7	12
8	8
9	1
10	21
11	16
12	32
13	9
14	44
15	44
16	1
17	21
18	16
19	24
20	41
21	80
22	60
23	44
24	92
25	1
26	41
27	68
28	92
29	31
30	156
31	80
32	51
33	112
34	81
35	112
36	20
37	21
38	92
39	92
40	123
41	41
42	272
43	48
44	124
45	71
46	156
47	112
48	128
49	22
50	34
51	156
52	77
53	81
54	244
55	156
56	244
57	176
58	123
59	92
60	332
61	33
62	272
63	164
64	1
65	124
66	384
67	72
68	165
69	272
70	384
71	156
72	119
73	39
74	101
75	128
76	188