A132065 - cp's OEIS frontend

A132065 a(n) = Sum_{k=1 to d(n)} C(d(n)-1, k-1) d_k, where d(n) is the number of divisors of n and d_k is the k-th divisor of n.

n	a(n)
1	1
2	3
3	4
4	9
5	6
6	22
7	8
8	27
9	16
10	32
11	12
12	123
13	14
14	42
15	40
16	81
17	18
18	164
19	20
20	171
21	52
22	62
23	24
24	704
25	36
26	72
27	64
28	219
29	30
30	808
31	32
32	243
33	76
34	92
35	72
36	1765
37	38
38	102
39	88
40	944
41	42
42	1016
43	44
44	315
45	276
46	122
47	48
48	4075
49	64
50	336
51	112
52	363
53	54
54	1224
55	104
56	1170
57	124
58	152
59	60
60	17815
61	62

[1, 3, 4, 9, 6, 22, 8, 27, 16, 32, 12, 123, 14, 42, 40, 81, 18, 164, 20, 171, 52, 62, 24, 704, 36, 72, 64, 219, 30, 808, 32, 243, 76, 92, 72, 1765, 38, 102, 88, 944, 42, 1016, 44, 315, 276, 122, 48, 4075, 64, 336, 112, 363, 54, 1224, 104, 1170, 124, 152, 60, 17815, 62]

cp's OEIS Frontend

A132065 a(n) = Sum_{k=1 to d(n)} C(d(n)-1, k-1) d_k, where d(n) is the number of divisors of n and d_k is the k-th divisor of n.

Table of values

List of values