A348279 - cp's OEIS frontend

A348279 a(n) = Sum_{d|n} d*d', where d' is the arithmetic derivative of d (A003415).

n	a(n)
1	0
2	2
3	3
4	18
5	5
6	35
7	7
8	114
9	57
10	77
11	11
12	243
13	13
14	135
15	128
16	626
17	17
18	467
19	19
20	573
21	220
22	299
23	23
24	1395
25	255
26	405
27	786
28	1047
29	29
30	1160
31	31
32	3186
33	476
34	665
35	432
36	2835
37	37
38	819
39	640
40	3389
41	41
42	2100
43	43
44	2427
45	1937
46	1175
47	47
48	7283
49	693
50	2577
51	1040
52	3333
53	53
54	5570
55	896
56	6295
57	1276

[0, 2, 3, 18, 5, 35, 7, 114, 57, 77, 11, 243, 13, 135, 128, 626, 17, 467, 19, 573, 220, 299, 23, 1395, 255, 405, 786, 1047, 29, 1160, 31, 3186, 476, 665, 432, 2835, 37, 819, 640, 3389, 41, 2100, 43, 2427, 1937, 1175, 47, 7283, 693, 2577, 1040, 3333, 53, 5570, 896, 6295, 1276]

cp's OEIS Frontend

A348279 a(n) = Sum_{d|n} d*d', where d' is the arithmetic derivative of d (A003415).

Table of values

List of values