A347405 - cp's OEIS frontend

A347405 a(n) = Sum_{d|n} 2^(tau(d) - 1).

n	a(n)
1	1
2	3
3	3
4	7
5	3
6	13
7	3
8	15
9	7
10	13
11	3
12	49
13	3
14	13
15	13
16	31
17	3
18	49
19	3
20	49
21	13
22	13
23	3
24	185
25	7
26	13
27	15
28	49
29	3
30	159
31	3
32	63
33	13
34	13
35	13
36	341
37	3
38	13
39	13
40	185
41	3
42	159
43	3
44	49
45	49
46	13
47	3
48	713
49	7
50	49
51	13
52	49
53	3
54	185
55	13
56	185
57	13
58	13
59	3
60	2275
61	3
62	13
63	49
64	127
65	13
66	159
67	3
68	49
69	13
70	159
71	3
72	2525
73	3
74	13
75	49
76	49

[1, 3, 3, 7, 3, 13, 3, 15, 7, 13, 3, 49, 3, 13, 13, 31, 3, 49, 3, 49, 13, 13, 3, 185, 7, 13, 15, 49, 3, 159, 3, 63, 13, 13, 13, 341, 3, 13, 13, 185, 3, 159, 3, 49, 49, 13, 3, 713, 7, 49, 13, 49, 3, 185, 13, 185, 13, 13, 3, 2275, 3, 13, 49, 127, 13, 159, 3, 49, 13, 159, 3, 2525, 3, 13, 49, 49]

cp's OEIS Frontend

A347405 a(n) = Sum_{d|n} 2^(tau(d) - 1).

Table of values

List of values