A323779 - cp's OEIS frontend

A323779 a(n) = numerator of Sum_{d|n} (tau(d)/sigma(d)) where tau(k) = the number of the divisors of k (A000005) and sigma(k) = the sum of the divisors of k (A000203).

n	a(n)
1	1
2	5
3	3
4	44
5	4
6	5
7	5
8	248
9	45
10	20
11	7
12	22
13	8
14	25
15	2
16	8213
17	10
18	75
19	11
20	176
21	15
22	35
23	13
24	124
25	133
26	40
27	119
28	55
29	16
30	10
31	17
32	2841
33	7
34	50
35	5
36	330
37	20
38	11
39	12
40	992
41	22
42	25
43	23
44	22
45	30
46	65
47	25
48	8213
49	99
50	665
51	5
52	352
53	28
54	119
55	14
56	62
57	33
58	16
59	31
60	88
61	32
62	85
63	225

[1, 5, 3, 44, 4, 5, 5, 248, 45, 20, 7, 22, 8, 25, 2, 8213, 10, 75, 11, 176, 15, 35, 13, 124, 133, 40, 119, 55, 16, 10, 17, 2841, 7, 50, 5, 330, 20, 11, 12, 992, 22, 25, 23, 22, 30, 65, 25, 8213, 99, 665, 5, 352, 28, 119, 14, 62, 33, 16, 31, 88, 32, 85, 225]

cp's OEIS Frontend

A323779 a(n) = numerator of Sum_{d|n} (tau(d)/sigma(d)) where tau(k) = the number of the divisors of k (A000005) and sigma(k) = the sum of the divisors of k (A000203).

Table of values

List of values