A317831 - cp's OEIS frontend

A317831 Numerators of rational valued sequence f whose Dirichlet convolution with itself yields A000203 (sigma, the sum of divisors).

n	a(n)
1	1
2	3
3	2
4	19
5	3
6	3
7	4
8	63
9	9
10	9
11	6
12	19
13	7
14	6
15	6
16	867
17	9
18	27
19	10
20	57
21	8
22	9
23	12
24	63
25	11
26	21
27	11
28	19
29	15
30	9
31	16
32	3069
33	12
34	27
35	12
36	171
37	19
38	15
39	14
40	189
41	21
42	12
43	22
44	57
45	27
46	18
47	24
48	867
49	41
50	33
51	18
52	133
53	27
54	33
55	18
56	63
57	20
58	45
59	30
60	57
61	31
62	24
63	18
64	22199
65	21
66	18
67	34
68	171
69	24
70	18
71	36
72	567
73	37
74	57
75	22
76	95
77	24
78	21
79	40
80	2601
81	227
82	63
83	42
84	19
85	27
86	33

[1, 3, 2, 19, 3, 3, 4, 63, 9, 9, 6, 19, 7, 6, 6, 867, 9, 27, 10, 57, 8, 9, 12, 63, 11, 21, 11, 19, 15, 9, 16, 3069, 12, 27, 12, 171, 19, 15, 14, 189, 21, 12, 22, 57, 27, 18, 24, 867, 41, 33, 18, 133, 27, 33, 18, 63, 20, 45, 30, 57, 31, 24, 18, 22199, 21, 18, 34, 171, 24, 18, 36, 567, 37, 57, 22, 95, 24, 21, 40, 2601, 227, 63, 42, 19, 27, 33]

cp's OEIS Frontend

A317831 Numerators of rational valued sequence f whose Dirichlet convolution with itself yields A000203 (sigma, the sum of divisors).

Table of values

List of values